Hot and itchy body may be due to cholinergic urticaria, eczema, atopic dermatitis and other diseases. 1. Cholinergic urticaria: It is usually caused by drinking alcohol, eating hot drinks, stress, exercise, etc. It is also related to mental tension, wearing tight clothes, taking hot baths, spicy diet and other factors. Patients will often appear small and very itchy masses, some patients can also appear tingling, some patients can also be accompanied by tingling sensation, burning sensation, etc., which can also appear on the body hot and itchy situation. 2. Eczema: the cause of the disease is not clear, mostly related to endocrine diseases, heredity, external environmental changes and other factors. Patients often appear erythema, edematous papules, papules, blisters, etc., can also be accompanied by vesicles, oozing, intense itching, etc., will also appear on the body hot and itchy phenomenon. And some patients can also appear skin roughness and hypertrophy, mossy changes and so on. 3. Atopic dermatitis: the cause of the disease is not clear, may be related to the environment, skin barrier function abnormalities, genetics, flora dysbiosis and other factors, and allergens, bad mood, temperature changes, etc., can also induce atopic dermatitis. Usually the patient will have dry skin, intense itching, chronic eczema-like dermatitis and other phenomena, preferably in the wrists, ankles, trunk, eyelids, elbow sockets, etc., which can also be manifested as hot and itchy body. It is recommended that patients with symptoms of hot and dry itchy body, promptly identify the cause of the disease, and follow the doctor’s instructions for systematic treatment.