Pollen Count July 23, 2013

Grasses – None

Tress – Low (Mostly Oak, Pine and Privet)

Weeds – Low (Mostly Chenopodiceae/Amaranthaceae)

Molds – Low

Pollen Count May 21, 2013

Grasses – Low

Trees – Moderate (Mostly Oak, Pine and Olive)

Weeds – Moderate (Mostly Chamise)

Molds – Low

Allergy Medications

Allergy Medicine can be quite helpful for control of allergy symptoms. This blog will review the over the counter options to start. As mentioned in the last blog, nasal saline rinses or sprays, artificial tears and moisturizing eyedrops represent a great first step.

A variety of antihistamines are also available. These can be taken orally in liquid or pill form. Some over-the-counter eye drops also contain antihistamines. Antihistamines can help reduce itching, sneezing, runny nose, post nasal drip and to a mild degree, nasal congestion. Different antihistamines contain active ingredients with different effects. The antihistamines are grouped in 2 general categories. The first generation antihistamines include diphenhydramine (aka Benadryl®, chlorpheniramine (Chlor-Triemton®), brompheniramine, doxylamine, and others. The first generation antihistamines cause drowsiness and should be avoided with driving.

The second generation antihistamines include loratadine (such as Claritin® or Alavert®), cetirizine (Zyrtec ® or Allertek®), or fexofenadine (such as Allegra®). In general these agents are less sedating although cetirizine can be associated with sedation in 10% of individuals.  The most common side effect associated with the second generation antihistamines include eye, mouth, and skin dryness.

The antihistamine/decongestant combinations (the above antihistamines in combination with phenylephrine or pseudoephedrine) can produce more significant relief of nasal congestion than with antihistamines alone. The use of the antihistamine/decongestant combinations however should be limited to short term use only, as prolonged use can lead to rebound increased nasal congestion. These medications also can be associated with significant side effects including headache, irritability, insomnia, and heart palpitations and are not advised in patients with certain underlying medical conditions such as high blood pressure.

Many people have symptoms not controlled with over the counter medications. These individuals will require evaluation by an Allergist for consideration of additional treatments. The next blog will talk about prescription medications for hay fever.

Pollen Count October 9, 2012

Grasses – Low

Trees – Moderate (Mostly Elm & Birch)

Weeds – Moderate (Mostly Sagebrush & Ragweed)

Molds – Low

Pollen Count October 2, 2012

Grasses – Low

Trees – Moderate (Mostly Elm)

Weeds – 0

Molds – Low

September 18 Pollen Count

Grasses – Low

Trees – Moderate (Mostly Elm & Pine)

Weeds – Moderate (Mostly Sagebrush)

Molds – Low

A Mother’s Day Health Blog: Allergies, the Ultimate Imbalance with Nature.

The New Pandemic: We have all heard the story: the prevalence of allergic disease has dramatically increased over the past generation. In the United States allergic disease (atopic dermatitis, food allergy, allergic rhinitis or “hay fever,” and allergic asthma) affects 20% of the population. As mothers we want to know why and what do we do for our generation of children afflicted with these conditions. I want to share with you some of the medical and scientific communities’ latest research regarding these issues. It is an exciting time of discovery but the answers are still unfolding for some of the specific questions. Fortunately, as the prevalence of these diseases rise, so does the support network and information sources for mothers of children with allergic disease.

So many of my patients’ moms tell me when they were children they knew of 1-2 total kids  with nut allergies and now there are 1-2 if not more children per class with nut allergies. Allergic asthma runs rampant among school age children, especially those living in inner city environments.  Allergic nasal symptoms not only contribute to persistent upper airway congestion, increased risk of sinus and ear infections but also can contribute to poor sleep and poor school or work performance.  Studies from the last decade estimate a total of 3.5 billion dollars per year spent on prescription drugs, over the counter allergy medication, and allergy related health care provider visits. Allergies affect cost in other ways with billions of lost dollars resulting from absenteeism from work or school. Clearly the effects of allergic disease go beyond the nose, lung and skin. So the big question is “what is going on?” In order to understand the current theories, it is imperative to note that allergic disease results from a complex interaction between genetics and environmental factors.

Eat Dirt, the Wonderful World of Microbes: The leading theory for the increase in allergic disease is referred to as the “hygiene hypothesis.” The crux of this theory is that our current society’s “clean practices” (smaller family size, less early life exposure to farm animals and dirt in general, and increased use of antibiotics) is skewing the infant’s immunologic development toward allergy. It appears that an individual’s immunologic fate is highly influenced in the first year of life. The big player in this fate is the infant’s gut. The gut is the largest immune organ in humans and in the first several months of life undergoes enormous change including population with bacteria. Everything from the route of birth (Vaginal versus C-Section), feeding practice, antibiotic exposure, home environment, and early life animal exposure, especially livestock exposure, influences the number and species of resulting gut bacterial colonies.  The gut microbial flora’s mingling with outside world’s ingested substances is thought to shape early immune development. We have all observed our infants happily mouthing objects in the outside world.  The infant’s gut is thought to be the first place where the body either ignores things or makes immune responses against them. The consequence from the hygiene hypothesis’ viewpoint is that the microbial equation necessary for tolerance to innocuous substances (food or environmental pollens), has been violated.  

Pollution, Dust mites, and Cockroaches, oh my!: Additionally, other outside influences may also turn on the genes for allergy. Elevated levels of certain airborne allergens such as dust mites and cockroaches are associated with increased  risk of nasal allergies, atopic dermatitis, and asthma. Furthermore, some air pollution components, namely diesel exhaust particles, have also been associated with elevated rates of allergic disease and asthma. Feeding practices among various cultures differ and it is hypothesized that this may also influence the development of food allergy. As an example, peanuts in the United States tend to be dry roasted. This type of preparation may enhance the “allergic-ness” or as we say in the business, the” immunogenicity”, of peanuts. Peanuts in some cultures with lower peanut allergy rates are boiled or introduced as a powdered ingredient in a first baby food.   Finally, there are some preliminary studies looking at the pollen consequences of increased temperatures and  environmental CO2 levels. These studies have demonstrated increased growth of allergic trees towards polar latitudes, earlier tree pollination, and increased amounts and immunogenicity of specific pollens.

Clearly both individual and  global factors are occurring. What is unclear is the relative contribution of each to an individual’s case. As you can see this is a complicated problem to dissect but there are intriguing studies attempting to pinpoint the sentinel events shaping immune development. The hope is that future studies will be able to shed light on a primary prevention strategy for allergic disease.

The first year: pregnancy, breastfeeding, formulas, solid food introduction, and pre/probiotics. Infants are considered to be at risk of allergic disease if at least one parent or sibling has any form of allergy (atopic dermatitis, food allergy, allergic asthma, allergic rhinitis). There have been studies done looking at the effect of maternal avoidance of cow’s milk, egg,  or peanut during pregnancy and breastfeeding. The take home message from these studies is that single food maternal restriction of cow’s milk, egg, or peanut in pregnancy and breastfeeding does not reduce risk for future development of allergic rhinitis, asthma or food allergy in the infant. There is one further piece of data worth mentioning. There are a couple of small studies looking at more intense allergen avoidance strategies for mothers. These studies look at maternal dietary restriction of several foods during pregnancy and breastfeeding including  cow’s milk, egg, and nuts (and fish and soy in some studies). These studies also included environmental dust mite avoidance strategies. The more intense diet avoidance paired with the dust mite environmental control measures seem to have a more pronounced effect on the prevention of atopic dermatitis, asthma and allergic rhinitis and a trend towards reduction in food allergy in the infants. This approach has to be undertaken with caution to ensure the mother’s diet is nutritionally complete and would need further discussion with an allergy specialist to determine if it is worthwhile to pursue.

Several questions regarding infant feeding practices have also emerged. Breast milk is the ideal source of nutrition for the first 4-6 months of an infant’s life. Breast milk may have a protective effect on the development of certain food allergies and is associated with decreased wheezing in children during the first 2 years of life.   When exclusive breast feeding is not possible or preferred, the infant is given formula. There are a variety of formulas out there including cows milk formula, soy formula, and more predigested(called hydrolyzed) cows milk formulas. At the extreme predigested end are amino acid based formulas. Current studies suggest that if breastfeeding is not an option or if formula supplementation is done in high risk infants, a partially or extensively predigested formula is preferred over regular cow’s milk formulas or soy formulas. Amino acid formulas are reserved for infants with several already established food allergies. In addition, several moms have questions regarding when to introduce solid foods. The window of opportunity appears to be between 4-6 months, even in infants at high risk for allergic disease. The practice of delaying introduction of solid food beyond 6 months has not been effective at prevention of allergic disease. Introduction of rice cereal, fruit, vegetables and meat constitute the usual first solid foods in an infant’s diet.

Finally there is a lot of buzz out there about prebiotics and probiotics. Prebiotics are nondigestable carbohydrates that stimulate the growth of one or a limited number of beneficial gut bacteria. Probiotics refer to a specific strain or groups of strains of beneficial gut bacteria. Prebiotics and probiotics are found in breast milk, can be added to infant formulas, are available as over the counter supplements, or are ingredients in specific foods such as yogurt. The idea is that populating the infants gut with beneficial bacteria may steer the future immune development away from a food or environmental allergic response. While this approach certainly holds promise, the exact way of how to do this, when to do this(again, there may be a limited window of time), and what is the best combination of administered bacteria is unknown. 

I want to emphasize that the above information applies only to infants at risk of allergic disease rather than those with established allergic disease such as atopic dermatitis. The specific feeding practices in those infants differ and require consultation with a medical professional.  Also all the data mentioned above refer to population based studies rather than to individual cases. The best approach to your specific situation will depend on you, your family, your living practices, and an informed discussion with your health care provider.

Check back next week for Part II:  “The Cat is Out of the Bag”

Eye Allergies

Eye Allergies:

Do you have red, itchy, teary eyes?   If so, you may have eye allergy, also called allergic conjunctivitis.  This occurs when something you are allergic to irritates the conjunctiva. This is the delicate membrane covering the eye and the inside of the eyelid.

Like all allergies, allergic conjunctivitis starts when the immune system identifies an otherwise harmless substance as an allergen. This causes your immune system to overreact and eventually produce chemicals which cause an allergic reaction. In this case, allergic reactions include eyes that water, itch, or become red or swollen.  The most common causes of allergic conjunctivitis are seasonal allergens such as pollen and mold spores.  Common triggers during the early spring are tree pollen.  As we get into later spring and summer, grass and weed pollen can trigger these symptoms.   Indoor allergens such as dust mites and pet dander can also cause eye allergies year-round.

Not all red eyes are due to eye allergies.  Unlike conditions such as pink eye, allergic conjunctivitis is not contagious.   However, red, itchy, burning and puffy eyes can be caused also by infections and other conditions that can threaten eyesight.  If your symptoms are related to an eye allergy, chances are you will have problems in both eyes. Whereas, red eyes caused by infections can be in one or both eyes.   That is why it is best to see your doctor to determine if your symptoms are from allergies or something else.

So, what do you do if you have allergic conjunctivitis symptoms?

The first step toward relief from annoying eye allergy symptoms is a proper diagnosis.  Allergists have specialized training and experience to accurately determine what is causing your symptoms and identify the best treatment approach.  When untreated, allergic conjunctivitis often leads to eye rubbing that can cause damage to your cornea, so don’t ignore your symptoms.

If indoor allergens are causing your eye allergy symptoms, avoidance is the key to relief. Use a vacuum with a HEPA filter to reduce dust in your home or try keeping pets out of the bedroom to reduce exposure to their dander.

If pollen and other seasonal allergens are causing your misery, here are some helpful suggestions:

1)      Wear a hat with a wide brim to reduce the amount of allergen that blows into the eyes.

2)      Sunglasses can also help reduce the amount of allergen that lands in the eyes.

3)      Because your hands may have traces of allergens on them wash them frequently and don’t rub your eyes.

4)      If your eyes are red and scratchy, remove your contacts and wear glasses instead.

5)      Apply saline eye drops to the eyes after being outdoors to wash away allergens from the ocular lining.

6)      Put a moist washcloth in the freezer for a few minutes and apply it to your itchy eyes to reduce itching and swelling.  Refrigerate your allergy eye drops; the chilled drops will soothe your eyes.

Over-the-counter antihistamine pills and eye drops are often used for short-term treatment of eye allergy symptoms. However, prolonged use of certain eye drops may actually make your symptoms worse.  Your doctor may prescribe stronger medications if your symptoms are long-lasting.  Many people with eye allergy symptoms have allergic reactions in other parts of the body too, like the nose, lungs, skin.  If this is the case, then your doctor may prescribe other medications such as antihistamine pills, nasal sprays, topical creams or asthma medications to relieve these symptoms. Depending on what is causing your eye allergy symptoms, immunotherapy (allergy shots) can be very effective in providing long-term resistance to the triggering allergens.

So, don’t let itchy eyes control your life!  Put your annoying eye allergies out with help from one of our well trained and experienced Allergists!

April 24, 2012 Pollen Count

Pollen Count for April 24, 2012

Grasses – Low

Trees – High (Mostly Oak, Sycamore, Sweet gum and Birch)

Weeds – None

Molds – Moderate

Seasonal Allergies

The weather warms, the days lengthen, and your child (and possibly the rest of the family) starts developing sneezing, sniffling, a sore throat, itchy watery eyes and a cough.  Is it a cold?  If it lasts more than a week, worsens after spending time outside, or recurs intermittently, these symptoms are most likely not related to a respiratory infection – they’re due to allergic rhinitis, commonly referred to as hay fever.  

Seasonal allergic rhinitis is extremely common, affecting up to 20% of those in theUnited States, and up to 40% ofU.S.children.  Allergy sufferers require approximately 3 additional office visits per year, 9 additional prescriptions per year, $1500 in additional healthcare costs per year, and add up to 2 million missed school days in theU.S.per year.

In addition, uncontrolled allergies can lead to more illness and higher healthcare costs due to associated conditions, such as sinus infections and asthma.

The triggers to symptoms during the spring months in the Bay Area are primarily grass and tree pollens, with some contribution from weed pollens in late spring and through the summer.  Pollen is the powdery substance that covers your car and driveway in the spring and summer.  It is carried in the wind and enters the eyes and nose, leading to the symptoms experienced by allergy sufferers. 

The key to improving your allergic child’s symptoms is to learn his triggers.  This is done in the allergist’s office by placing extracts made from various pollens on the skin.  If symptoms are present for long periods of time, additional skin testing may also be done to check for allergy to mold, dust mite or pets. A positive skin test results in a small, raised bump at the site within 20 minutes.  Compared with blood testing for allergies, skin testing is more sensitive and reliable, generally less costly, and provides immediate results. 

There are steps that can be taken to avoid outdoor allergens, thereby lessening spring allergy symptoms.  These include:

•Keeping windows in the home and automobile closed as much as possible.

•Limiting outdoor activity during windy days.

•Changing clothing after outdoor activity.

•Showering and washing hair in the evening to remove pollen prior to bedtime.

•Rinsing the nose and eyes with saline spray or drops to wash away pollen.

If not controlled with the above control measures, there are several groups of medications available to help lessen your child’s allergy symptoms.  These include antihistamine and/or decongestant tablets or liquid, nasal steroid sprays, and nasal antihistamine sprays.  If your child’s allergy symptoms are significant, it may require combinations of these medications to gain good control.  The key is working with your physician to address the allergy triggers and formulate a treatment plan prior to the peak of allergy season, in order to prevent undue suffering.  While medications are quite effective and safe, if not used early or if the allergies are severe, the medications may not control symptoms adequately.  There are no medications that “cure” this condition, so if not taken as directed, the allergy symptoms will return year after year.

Have you heard of allergy shots, also known as immunotherapy?  This excellent form of treatment consists of delivering small amounts of the particular allergens that cause your child’s symptoms just under the skin, causing little to minimal discomfort.  Over time, the amount of allergen in the shots is increased, which helps the immune system to become more and more resistant to the effects of the allergens in the environment. There are oral drops that can be used similarly, but shots are twice as effective in lessening the allergy symptoms.  Allergen immunotherapy is the only type of treatment currently available that actually alters the condition, and if started early enough, can lead to a long term cure.  Also, allergy shots have been proven to alter the course of the disease, lessening the chance of developing new allergies and asthma.  Allergy specialists have been well trained in the knowledge and skills necessary to safely formulate and deliver immunotherapy, so if considering this course of treatment, be sure to visit a board certified allergist for the best care possible.

The right care can make the difference between suffering with an allergic disease and living a symptom-free life.  So don’t let your child suffer this spring.  By visiting an allergist, you can expect an accurate diagnosis, a treatment plan that works, and educational information to help you and your child manage their disease and enjoy our beautiful Bay Area spring and summer!