Common allergic foods mainly include seafood, fruits and vegetables. 1, seafood: seafood is a kind of food that easily causes allergic reactions. Because of the high content of foreign proteins in seafood, people who are allergic to it will stimulate human immune cells and induce allergic symptoms. Common seafood that can easily cause allergies are crabs, crayfish, scallops, squid, tuna and clams. 2. Fruits and vegetables: If some people eat lemons, mangoes, peaches, kiwis, pineapples, durians, strawberries, mushrooms, celery, tomatoes, bamboo shoots and so on. They may also have allergic reactions, such as diarrhea, nausea, rash and even laryngeal edema; 3. Others: Common foods in daily life, such as milk, peanuts, walnuts, eggs, wheat, soybeans and their products, are also easy to cause allergies. There are many foods in daily life that can easily cause allergic reactions, but not all allergic people can't eat them. Allergic to certain foods. If you want to know what kind of food you are allergic to, it is recommended to go to a regular hospital for skin prick test to determine allergens. Substances that can cause allergic reactions are called allergens. Humans are usually exposed to allergens through skin contact, diet, inhalation and other ways. Allergic patients may have skin papules, red eyes, runny nose, sneezing and other symptoms. In severe cases, there will be dyspnea and even shock. After timely and effective treatment, the prognosis of this disease is generally good. Allergies can be prevented. The main preventive measure is to avoid contact with the identified allergens again. Allergic patients should eat foods rich in vitamin D, such as salmon, milk and orange juice. Vitamin d helps to reduce asthma attacks. Eating more foods rich in vitamin A can improve lung function. Such as carrot, cantaloupe, cauliflower, etc. , help to improve lung function. Eat more foods rich in vitamin C. Vitamin C can reduce the permeability and brittleness of capillaries and help to recover. Eating more foods rich in magnesium, such as spinach, pumpkin seeds and dark chocolate, can improve vital capacity and vital capacity. You can also eat more bananas. Bananas contain more antioxidants and potassium, both of which are beneficial to lung function. Patients with allergic rhinitis should drink more water.