Itchy sweating may be due to cholinergic urticaria, tinea corporis, lichen planus and other diseases. 1. Cholinergic urticaria: when the human body is in the state of strenuous exercise, stress reaction, drinking alcohol, eating hot beverages, etc., it will increase the temperature of the skin center, prompting cholinergic nerve impulses, and then the release of acetylcholine, resulting in urticaria, which can be triggered by sweating, so the patient will have itching, tingling and other symptoms. 2. Ringworm: The common causative organisms of the disease are Trichophyton rubrum and Trichophyton mustelii, which can be transmitted from person to person and from pollutant to pollutant. Red papules, patches and blisters will appear on the skin, which can be accompanied by different degrees of itching, so the patients will be itchy as soon as they sweat. 3. Mottled furuncle: this disease is caused by Malassezia infection, but also with heredity, wearing airtight clothes, sweating, high temperature and humid environment and other factors, common symptoms of a little patchy rash, itching, etc., and in some cases, it can be manifested as itchy when sweating. It is recommended that patients who itch when they sweat go to the hospital in time to complete a series of relevant examinations to clarify the specific causes.