fbpx

Do you or your children suffer from allergies? If so you are among millions of people who also suffer from allergies. Not every sufferer is allergic to the same thing, however. Some people are allergic to things in the home, like pets, mold or dust mites. This means they may have symptoms all year round. Others are allergic to things outside the home, like grass, pollen and trees. For these people, their allergy symptoms will come and go based on the season. Finally, many people can also be allergic to foods. Food allergies actually account for the majority of allergic reactions.

What causes allergies?
Our bodies all have a very elaborate immune system to help protect us from invaders like viruses and bacteria. We have proteins called immunoglobulins (Ig) which help initiate the attack. Sometimes, our immune system attacks otherwise harmless invaders, like pollen. The immunoglobulin that is responsible for this is the IgE. An elevated IgE to an antigen (the protein on and invader that triggers an immune response) might mean an allergic reaction. IgE lives on mast cells and basophil cells and when it is triggered it causes a release of histamine, along with other chemical mediators. The histamine release then causes allergy symptoms.

As noted above, allergens can be in the home, the environment or in our food. Environmental allergens change from season to season depending on the weather and what is blooming. In the spring, pollen from trees is the typical cause of allergy symptoms. However, according to Dr. David Stukus of Nationwide Children’s Hospital, young children need multiple exposures to the pollen, or allergen, before they can develop an allergic response. Therefore, they won’t typically show allergy symptoms until about 2 or 3 years old. Younger children can develop allergies to indoor allergens, like pets or dust mites, because of more regular exposure.

What are the symptoms of seasonal allergies?
Dr. Stukus states that exposure to allergens “typically causes itching of the eyes and nose, sneezing, runny nose, and nasal congestion. Cough frequently occurs due to mucous running down the back of the throat.” This is due to inflammation of the mucous membranes after the histamine is released.  Because allergy seasons last for several weeks to months, symptoms can last that long as well.

While allergy symptoms are very similar to viral upper respiratory infection symptoms (common cold), there are ways to tell the difference. Dr. Stukus says “first, fever and yellow/green mucous never occur with allergies (but do frequently occur with colds).  Allergies cause clear runny nose. Second, infections typically last 10-14 days then resolve. Younger children especially may get back-to-back (to back) infections and seem like they’re sick all the time. This is quite normal and improves with age. Itching is a hallmark for allergies as well, and typically does not occur during colds.”

How do I know what my child is allergic to?
Based on the above description of symptoms and timing, your pediatrician can diagnose allergies and initiate therapy without any testing. If your child fails therapy, testing may be indicated. Allergy testing can actually be done in any age child exhibiting allergy symptoms but is frequently negative in “younger children because they are typically being referred or tested for non-allergic conditions such as frequent upper respiratory infections, nonallergic rhinitis, colic, or chronic gastrointestinal symptoms” says Dr. Stukus.

Dr. Stukus states that allergy testing may also be indicated if official diagnosis is needed, treatment options will change or if the parent or pediatrician isn’t sure what is causing a child’s symptoms. For food allergies, “any child who experiences a classic food allergy reaction such as immediate onset hives, swelling or anaphylaxis after ingestion of a food should be referred not only for testing to establish the proper diagnosis, but also for education and anticipatory guidance.” Dr. Stukus and I both agree that with food allergies, the allergist is the best person to let parents know what ingredients to avoid and what to do if their child ingests an allergen and/or develops symptoms. Allergists “stay on top of all the latest research” so they are a great resource for parents and pediatricians. That’s what they are there for!

How will my child be tested?

There are several ways to test for allergies.  From Dr. Stukus:

  1. Skin prick testing: This involves placing a drop of allergen on top of the skin, then gently scratching the surface to introduce to the allergy cells. If a bump (wheal) and redness (flare) develops, this indicates that an allergy may be present. Results are seen within 15 minutes. One caveat – any medication containing antihistamines needs to be stopped about 4 or 5 days prior to testing otherwise the test won’t work.
  2. Serum IgE levels (formerly RAST, now immunoCAP): This involves sending a blood sample to a laboratory to analyze levels of specific IgE (the allergy antibody) towards any type of allergen. Medications do not interfere with this test result at all. Results are not immediate, typically taking 1-5 days, depending upon the lab.

Unfortunately, these tests are not perfect and are considered screening, not diagnostic. They are best used in conjunction with a good clinical history. Also, the size of the response may be more likely to indicate an actual allergy but can not predict the severity of the patient’s response. This is why large panels of blood or skin tests are not recommended. There are many false positives and may lead to diet or lifestyle changes that aren’t necessary.

  1. Oral food challenge: This is considered the gold standard to diagnose food allergies. This occurs in the physician’s office and gradually increasing amounts of food are introduced every 10 minutes for one hour until about 6-10 grams (at least 1-2 servings) are ingested. Patients are then monitored for another 2-3 hours to make sure nothing happens. If no symptoms occur, then a food allergy is not present. If symptoms do occur, they can be treated promptly by the physician and their staff, who are equipped to handle anything. Food challenges are not the first test performed, but can be useful when skin/blood testing is inconclusive or if tests indicate a known food allergy may be resolving.

How should I treat my child’s allergies?
There are 2 options for first line treatments for children with seasonal allergies. The first option is an antihistamine. These are good for kids who are itchy with a lot of sneezing and runny nose. Medications like Zyrtec or Claritin block the histamine response without the sedating effects of older antihistamines like Benadryl. They also last up to 24 hours so only need to be taken once a day. The second option is a nasal steroid like Flonase or Nasonex. These medications are good for nasal congestion but “they need to be used daily and consistently and won’t help much when used as needed or only during symptoms. Ideally, these will be started at least 2 weeks prior to the start of allergy season,” according to Dr. Stukus. “Lastly, when the combination of medications and avoidance measures are no longer effective, desired, or tolerated, then immunotherapy (allergy shots) may help. Immunotherapy involves taking what someone is allergic to, diluting it, then injecting it back into the body. It requires a series of build up injections over 4-6 months, followed by monthly injections for up to 5 years. Symptoms do not improve immediately but may start to lessen after 6-12 months of therapy. Each injection must be given in a doctor’s office with a 30 minute observation due to rare occurrence of anaphylaxis. For the right child, this can cure their allergies and also prevent the development of new allergies and even asthma.”

If you think your child has allergies or may need to see an allergist, contact your pediatrician.

Welcome To The CPCMG Blog

Spring is in the air..and so is pollen

Do you or your children suffer from allergies? If so you are among millions of people who also suffer from allergies. Not every sufferer is allergic to the same thing, however. […]

READ MORE

Is My Kid’s Growth Normal? A Primer on Childhood Growth Charts

Chances are, one of many things your pediatrician will do at your child’s checkup is plot his/her height and weight on the growth chart, and tell you what percentile your […]

READ MORE

The Importance of Immunizations

The Importance of Immunizations It’s National Infant Immunization Week! Vaccinating your children helps to protect them against many major diseases including measles, polio, tetanus, pertussis, hepatitis A and B, and […]

READ MORE

Great Grains for Babies and Toddlers

Just like grown-ups, babies and toddlers benefit from eating a variety of grains as part of a healthy diet, including whole grains. Whole grains contain many benefits: they are rich […]

READ MORE

Healthy Snacks for Kids

Many families are on the go all day and need to find healthy snacks to grab and eat on the run. Rather than reaching for another sugary granola bar, here are some healthier alternatives to add into the mix!

READ MORE

Meet Dr. Adrienne Lostetter

A Texas native, this CPCMG pediatrician has moved 14 times with her military family, enjoys staying physically active and loves watching her young patients grow into young adults. Meet Dr. Adrienne Lostetter, pediatrician at CPCMG Gateway in Poway.

READ MORE

Home Trampolines: 5 Ways to Keep Kids Safe

Trampolines are soaring in popularity. From backyard trampolines to trampoline-themed recreation centers, children and teens are bouncing up and down to have fun and also to get a bit of exercise. But with all that jumping going on, some children get hurt.

READ MORE

Button Battery Injuries in Children: A Growing Risk

As household electronics and personal devices continue to shrink in size, they also pose a dangerous risk to infants and young children – many of these items contain small lithium or button batteries that when swallowed, can cause serious injury. In 2013, more than 2,800 children were treated for swallowing button batteries – that’s one child every three hours! What do you need to know to keep your family safe?

READ MORE

What is RSV?

Every year from November to April we are officially in RSV season. This may not mean much to you but for pediatricians this is something we brace for and dread. So why should you care? Typically an older child or adult infected with RSV will seem to just have a cold. However, if you have an infant or small child, RSV, respiratory syncytial virus, can be much more than just a cold.

READ MORE

What is a “cold” and how should you treat it?

Every fall/winter we go through the same dreaded respiratory virus season.  What exactly does that mean?  For doctors it means very busy days in the office.  For patients it means lots […]

READ MORE