
Food allergies. These are triggered by your immune system trying to protect you from something it wrongly thinks is harmful. Eating foods you’re allergic to can trigger rashes, airway swelling, trouble breathing, vomiting and dangerously low blood pressure. If you have severe food allergy symptoms, go to the emergency room.
FOOD ALLERGIES
Food allergies occur when your body reacts to a food that it believes to be dangerous. It may cause hives, swelling, upset stomach, and trouble breathing in an attempt to protect you. anaphylaxis, which is brought on by food allergies, can result in severe blood pressure drops or airway edema. If you have swelling in your face, mouth, or throat, have trouble breathing or swallowing, or feel faint, or go to the emergency room right away.
Symptoms

Food allergy symptoms include:
Skin rash or hives
Itchy skin
swelling in your mouth, lips, tongue, or face
The throat and mouth are itchy.
Hoarse voice
Having trouble swallowing
Wheezing
Shortness of breath or trouble breathing
Coughing
Pain in the abdomen
Vomiting
Diarrhea
Causes
Your immune system incorrectly perceives a food protein as dangerous (as if it were a virus or bacteria) when you have a food allergy. When you consume an allergen, your body starts to flush the allergen out of your system and activate defense mechanisms. This results in your symptoms, which can occasionally be fatal.
Treatment

Avoiding your allergen is the best method to manage food allergies. However, some treatments, such as injections and oral and sublingual immunotherapy programs, may lower your risk of experiencing an allergic reaction. Emergency drugs, such as epinephrine, should also be kept on hand in case you inadvertently consume something that contains the food to which you are allergic.
Injections of omalizumab
Once or twice a month, your doctor administers omalizumab (Xolair®) injections to you, or they can teach you how to do it on your own. In the event that you are unintentionally exposed to a food to which you are allergic, it can lessen the likelihood that you will experience a reaction.
Immunotherapy taken orally
A regimen called oral immunotherapy (OIT) can help you or your kid develop a tolerance to a food allergen. Over the course of several months, your provider will give you progressively higher doses of your allergen. The objective is to become “bite-proof,” meaning that even if you are unintentionally exposed to trace amounts of the food you are allergic to, you won’t react. Some people can easily eat food they were once allergic to after OIT.
Immunotherapy under the tongue
Similar to OIT, sublingual immunotherapy (SLIT) involves daily exposure to a little quantity of your allergen in order to build tolerance. Instead of eating the meal you’re allergic to, you slip a liquid or tablet beneath your tongue and let it dissolve.
Prevention

Ask your baby’s healthcare provider when and how to introduce new foods; depending on your child’s other medical conditions, they may advise introducing allergens earlier or under a provider’s supervision. If you’re breastfeeding, include peanuts and other common allergens in your regular diet (as long as you’re not allergic to them yourself). Once you’ve safely introduced your child to potential allergens, keep feeding them a variety of foods that they aren’t allergic to, such as milk, eggs, and nuts, as this may lower their chance of developing an allergy later on.
Summary
Food allergies can catch you off guard, whether your child has them or you have just received a diagnosis. Thinking about what you or your child will be able to eat, how you’ll manage to avoid certain foods, and whether you’ll ever be able to eat in a restaurant again can be overwhelming and worrying. However, the persistent worry is temporary for the majority of people.