Itchy face after sweating may be due to sweat stimulation, cholinergic urticaria, lichen planus and other reasons. 1. Sweat stimulation: the human body sweats after a lot of exercise, if the skin is sensitive people, by the sweat stimulation, may appear after sweating face itchy situation. 2. Cholinergic urticaria: patients who suffer from cholinergic urticaria, intense exercise after the body temperature rises with a lot of sweating, then acetylcholine will act on mast cells to release inflammatory factors and the onset of the patient may appear after sweating face is very itchy. 3. lichen planus: is due to malassezia infection formed, usually accompanied by itching, and the body sweats a lot after the moist environment is conducive to the reproduction of malassezia, the patient may appear after sweating face is very itchy situation. Itchy face after sweating may also be caused by ringworm, eczema, etc. It is recommended that patients go to regular hospitals for timely examination and standardized treatment under the guidance of professional doctors.