Urticaria, also known as wind-bumps, is a very common skin disease. There are no definite findings on the causes of urticaria, and most urticaria cannot be found, especially chronic urticaria. Common causes include spicy and acidic foods that may trigger hives, inhalation of smoke or chemically irritating drugs such as benzene that may trigger hives. In addition, patients with infections, such as severe bacterial infections or toxemia, may also trigger urticaria, and physical factors such as mechanical stimulation, heat and cold, sunlight, and noise may also cause urticaria. Physical factors such as mechanical stimulation, heat and cold, sunlight, noise, etc. may also cause urticaria. Some people may also experience cholinergic urticaria after consuming hot drinks, and some people may experience increased urticaria attacks due to mental factors such as excessive stress, anxiety, depression, etc. It is difficult to determine the factors that cause the onset of urticaria, and the treatment of urticaria in clinical practice is mainly through the internal administration of antihistamines.