Itchy face after exercise and sweating may be caused by the stimulation of sweat, cholinergic urticaria, eczema and so on. 1. Stimulation of sweat: A lot of exercise may lead to sweating, and people with sensitive skin may be stimulated by sweat, which may cause their faces to itch. 2. Cholinergic urticaria: Exercise leads to an increase in body temperature, which may cause physical urticaria characterized by intense itching and clamminess, which may lead to itching, redness or pimples on the face. 3. Eczema: Itchy face after exercise, but also to understand whether it is related to eczema. Such as ultraviolet light, pollen, animal fur, sweat stimulation may be induced, resulting in facial redness, itching, there may be pimples, papules and other manifestations. There are a variety of possible causes of itchy face after exercise, such as willow allergy, mosquito bites and so on may also lead to itchy face. It is recommended to pay attention to skin care, if necessary, under the guidance of a doctor to give the appropriate drug treatment.