Allergy, not only the skin is red and itchy, internal organs also have “allergic” reactions, manifested as gastrointestinal symptoms (such as abdominal pain, diarrhea, vomiting), respiratory symptoms (such as chest tightness, pharyngeal obstruction), and in severe cases, laryngeal edema can cause asphyxia, and can also cause a drop in blood pressure leading to anaphylaxis (manifested as dizziness, cold sweats, chills, loss of consciousness, etc.) and life-threatening. It can also cause a drop in blood pressure leading to anaphylactic shock (manifested as dizziness, cold sweats, chills, loss of consciousness, etc.) and life-threatening. What foods can cause these severe allergic reactions? Common ones include water fish (also known as turtle and snapper), bee pupae, silkworm pupae, robin, shrimp, crab, and stinky tofu. Acute allergy caused by food usually occurs the first time you eat it, but stinky tofu is different. A significant number of patients who are allergic to stinky tofu have eaten it many times before they become allergic, and this situation may be related to the different practices of various businesses. Allergies often occur within minutes to hours of eating, each patient’s allergy is different, some people just skin allergies, while some people also have the above-mentioned visceral “allergy” performance, the symptoms can appear successively, but also at the same time. Some patients even come to the clinic with symptoms such as abdominal pain without obvious red and itchy skin. Allergies have nothing to do with how much you eat. People who are allergic to food, even if they just take a small bite or a sip of soup, can develop severe allergies. If the skin is only red and itchy, it is not life-threatening and can usually be relieved by taking anti-allergy medication, but once symptoms such as a feeling of obstruction in the throat, dizziness, chest tightness, chills and difficulty in breathing appear, it indicates that the symptoms are serious and need to be treated by the nearest doctor in a timely manner.