Allergies may go away on their own without treatment, but they may also get worse, depending on the patient’s specific situation, and cannot be generalized. Allergic reactions are reactions that occur when an organism that has developed immunity is stimulated by the same allergen again, and commonly include urticaria, allergic rhinitis, and anaphylaxis. Hives have the characteristic of disappearing within 24 hours, and if the patient’s condition is mild, it may heal itself after a few hours; allergic rhinitis has symptoms lasting more than one hour per attack, but it often recurs and needs to be treated in a certain way; anaphylaxis is the most serious allergic reaction, and death can occur in a short time in serious cases, so it needs to be treated in time. When allergy occurs, it is recommended to go to the dermatology or allergic reaction department of the hospital in time to take appropriate treatment after being judged by professional doctors, do not judge yourself and delay the condition.