Allergies
Allergies are among the most common heath problems, with more than 50 million people afflicted with asthma, seasonal hay fever, or other allergy-related conditions each year.
Allergies can affect anyone, regardless of age, gender, race, or socioeconomic class. Generally, allergies are more common in children, however, a first-time occurrence can happen at any age, or recur after many years of remission.
There is a tendency for allergies to occur in families, although the exact genetic factors that cause it are not yet understood. Listed in the directory below are some common allergic conditions in the growing child, for which we have provided a brief overview.
What is allergic rhinitis?
Rhinitis is a reaction that occurs in the nose when airborne irritants (allergens) trigger the release of histamine. Histamine causes inflammation and fluid production in the fragile linings of nasal passages, sinuses, and eyelids.
There is usually a family history of allergic rhinitis.
What are the types of allergic rhinitis?
The two categories of allergic rhinitis include:
- Seasonal - occurs particularly during pollen seasons. Seasonal allergic rhinitis does not usually develop until after 6 years of age.
- Perennial - occurs throughout the year. This type of allergic rhinitis is commonly seen in younger children.
What are the causes of allergic rhinitis?
The most common causes of allergic rhinitis include the following:
- pollen
- dust mites
- mold
- animal dander
What are the symptoms of allergic rhinitis?
The following are the most common symptoms of allergic rhinitis. However, each child may experience symptoms differently. Symptoms may include:
- sneezing
- congestion
- runny nose
- itchy nose, throat, eyes, and ears
- nosebleeds
- clear drainage from the nose
Children with perennial allergic rhinitis may also have the following:
- recurrent ear infections
- snoring
- mouth breathing
- fatigue
- poor performance in school
- "allergic salute" - when a child rubs his/her hand upward across the bridge of the nose while sniffing. This may cause a line or crease to form across the bridge of the nose.
The symptoms of allergic rhinitis may resemble other conditions or medical problems. Always consult your child's physician for a diagnosis.
How is allergic rhinitis diagnosed?
Typically, the diagnosis is made by your child's physician based on a thorough medical history and physical examination. In addition to the above symptoms, your child's physician may find, upon physical examination, dark circles under the eyes, creases under the eyes, and swollen tissue inside the nose.
Treatment for allergic rhinitis:
Specific treatment for allergic rhinitis will be determined by your child's physician based on:
- your child's age, overall health, and medical history
- extent of the reaction
- your child's tolerance for specific medications, procedures, or therapies
- expectations for the course of the reaction
- your opinion or preference
Treatment options may include:
- Avoidance of the allergens: Avoidance of the allergens that are causing the problem is the best treatment.
- Over-the-counter antihistamines: Antihistamines help to decrease the release of histamine, possibly decreasing the symptoms of itching, sneezing, or runny nose. Some examples of antihistamines are diphenhydramine (Benadryl®) or hydroxyzine (Atarax®). These medications may cause drowsiness. Consult your child's physician to determine the proper dosage for your child.
- Nonsedating prescription antihistamines: Nonsedating antihistamines work like antihistamines but without the side effect of drowsiness. Nonsedating antihistamines may include cetirizine (Zyrtec®), loratadine (Claritin®), or fexofenadine (Allegra®). Consult your child's physician to determine the proper dosage for your child.
- Anti-inflammatory nasal sprays: Anti-inflammatory nasal sprays help to decrease the swelling in the nose. Consult your child's physician to determine the proper dosage for your child.
- Corticosteroid nasal sprays: Corticosteroid nasal sprays also help to decrease the swelling in the nose. Corticosteroid nasal sprays work best when used before the symptoms start, but can also be used during a flare-up. Consult your child's physician to determine the proper dosage for your child.
- Decongestants: Decongestants help by making the blood vessels in the nose smaller, thus, decreasing congestion. Decongestants can be purchased either over-the-counter or by prescription. Consult your child's physician to determine the proper dosage for your child.
- Anti-leukotrienes: These are a relatively new type of medication being used to control the symptoms of asthma. These medications help to decrease the narrowing of the lungs and decrease the chance of fluid in the lungs. These are usually given by mouth.
If your child does not respond to avoidance or to the above medications, your child's allergist then may recommend allergy shots or immunotherapy based on the findings. Immunotherapy usually involves a three to five-year course of repeated injections of specific allergens to decrease the reaction to these allergens when your child comes into contact with them. Consult your child's physician for more information.
How is allergic rhinitis prevented?
Preventive measures for avoiding allergic rhinitis include the following:
- environmental controls, such as air conditioning, during pollen season
- avoiding areas where there is heavy dust, mites, molds
- avoiding pets
The link between allergic rhinitis and asthma:
Controlling asthma may mean controlling allergic rhinitis in some patients, according to allergy and asthma experts. Allergic rhinitis is a common problem that may be associated with asthma.
Guidelines from the World Health Organization (WHO) recognize the link between allergic rhinitis and asthma. Although the link is not fully understood, one theory asserts that rhinitis makes it difficult to breathe through the nose, which hampers the normal function of the nose. Breathing through the mouth does not warm the air, or filter or humidify it before it enters the lungs, which can make asthma worse.
What is a food allergy?
A food allergy is an abnormal response of the body to a certain food. It is important to know that this is different than a food intolerance, which does not affect the immune system, although some of the same symptoms may be present.
What causes food allergy?
Before having a food allergy reaction, a sensitive child must have been exposed to the food at least once before, or could also be sensitized through breast milk. It is the second time your child eats the food that the allergic symptoms happen. At that time, when IgE antibodies react with the food, histamines are released, which can cause your child to experience hives, asthma, itching in the mouth, trouble breathing, stomach pains, vomiting, and/or diarrhea.
What is the difference between food allergy and food intolerance?
Food allergy causes an immune system response, causing symptoms in your child that range from uncomfortable to life-threatening. Food intolerance does not affect the immune system, although some symptoms may be the same as in food allergy.
What foods most often cause food allergy?
Approximately 90 percent of all food allergies are caused by the following six foods:
- milk
- eggs
- wheat
- soy
- tree nuts
- peanuts
Eggs, milk, and peanuts are the most common causes of food allergies in children, with wheat, soy, and tree nuts also included. Peanuts, tree nuts, fish, and shellfish commonly cause the most severe reactions. About 6 percent to 8 percent of children under the age of six years have food allergies. Although most children "outgrow" their allergies, allergies to peanuts, tree nuts, fish, and shellfish may be life-long.
What are the symptoms of food allergy?
Allergic symptoms may begin within minutes to an hour after ingesting the food. The following are the most common symptoms of food allergy. However, each child may experience symptoms differently. Symptoms may include:
- vomiting
- diarrhea
- cramps
- hives
- swelling
- eczema
- itching or swelling of the lips, tongue, or mouth
- itching or tightness in the throat
- difficulty breathing
- wheezing
- lowered blood pressure
According to the National Institute of Allergy and Infectious Disease, it does not take much of the food to cause a severe reaction in highly allergic people. As little as 1/44,000 of a peanut kernel can cause an allergic reaction in severely allergic individuals. The symptoms of food allergy may resemble other problems or medical conditions. Always consult your child's physician for a diagnosis.
Treatment for food allergy:
There is no medication to prevent food allergy. The goal of treatment is to avoid the foods that cause the symptoms. After seeing your child's physician and finding which foods your child is allergic to, it is very important to avoid these and other similar foods in that food group. If breastfeeding your child, it is important to avoid foods in your diet that your child is allergic to. Small amounts of the food allergen may be transmitted to your child through your breast milk and cause a reaction.
It is also important to give vitamins and minerals to your child if he/she is unable to eat certain foods. Discuss this with your child's physician.
For children who have had a severe food reaction, your child's physician may prescribe an emergency kit that contains epinephrine, which helps stop the symptoms of severe reactions. Consult your child's physician for further information.
Some children, under the direction of his/her physician, may be given certain foods again after 3 to 6 months to see if he/she has outgrown the allergy. Many allergies may be short-term in children and the food may be tolerated after the age of 3 or 4.
Milk and soy allergy:
Allergies to milk and soy are usually seen in infants and young children. Often, these symptoms are unlike the symptoms of other allergies, but, rather, may include the following:
- colic (fussy baby)
- blood in your child's stool
- poor growth
Often, your child's physician will change your baby's formula to a soy formula or breast milk if it is thought he/she is allergic to milk. If your child has problems with soy formula, your child's physician might change him/her to an easily digested hypoallergenic formula.
The symptoms of a milk or soy allergy may resemble other problems or medical conditions. Always consult your child's physician for a diagnosis.
Prevention of food allergies:
The development of food allergies cannot be prevented, but can often be delayed in infants by following these recommendations:
- If possible, breastfeed your infant for the first 6 months.
- Do not give solid foods until your child is 6 months of age or older.
- Avoid cow's milk, wheat, eggs, peanuts, and fish during your child's first year of life.
Dining out with food allergies:
If your child has one or more food allergies, dining out can be a challenge. However, it is possible to have a healthy and satisfying dining-out experience - it just takes some preparation and persistence on your part.
The American Dietetic Association offers these tips for dealing with food allergies when your family is eating away from home:
- Know what ingredients are in the foods at the restaurant where you plan to eat. When possible, obtain a menu from the restaurant ahead of time and review the menu items.
- Let your server know from the beginning about your child's food allergy. He or she should know how each dish is prepared and what ingredients are used. Ask about preparation and ingredients before you order. If your server does not know this information or seems unsure of it, ask to speak to the manager or the chef.
- Avoid buffet-style or family-style service, as there may be cross-contamination of foods from using the same utensils for different dishes.
- Avoid fried foods, as the same oil may be used to fry several different foods.
Another strategy for dining out with food allergies is to give your server or the manager a food allergy card. A food allergy card contains information about the specific items your child is allergic to, along with additional information, such as a reminder to make sure all utensils and equipment used to prepare your meal are thoroughly cleaned before use. You can easily print these cards yourself using a computer and printer. If your child is eating out with friends and you are not going to be present, give your child a food allergy card (or make sure the adult in charge has one) to give to the server.
Alternately, there are several types of allergy cards available on the internet that can be customized with your child's personal information. One example is the "Food Allergy Buddy" Dining Card, promoted by the National Restaurant Association.
The Food Allergy Initiative, in conjunction with the National Restaurant Association and the Food Allergy and Anaphylaxis Network, has developed the Food Allergy Training Program for Restaurants and Food Services. This training program was developed to help restaurants and other food service outlets ensure their customers, including those with food allergies, will receive a safe meal prepared to customer specifications.