Urticaria, or urticaria, usually subsides within 24 hours, and in a few cases it may extend to several days or weeks. Urticaria is a limited edematous reaction caused by the dilation and increased permeability of small blood vessels in the skin and mucous membranes, often with pruritus as the first symptom, which can gradually appear as bright red or pale white wind masses, a few of which can be accompanied by edematous erythema. The onset of the clusters is variable and varies in size and shape. Acute urticaria usually resolves itself within 24 hours, while chronic urticaria is recurrent and can last from several days to several months, generally occurring at least twice a week. The causes of urticaria are complex, and common causes include infections, medications, mosquito bites, genetics, physical stimuli or mental factors. Treatment is based on removing the cause, avoiding triggering factors and symptomatic treatment with medications, including antihistamines, glucocorticoids and immunosuppressive drugs. Patients are advised to pay attention to personal hygiene, enhance nutrition and avoid excessive mood swings during urticaria attacks, cooperate with doctors to identify the cause and actively treat the symptoms.