Summer face does not sweat may be due to vitamin A deficiency, skin disease, congenital sweat gland dysplasia and so on. 1. Vitamin A deficiency: when the body lacks vitamin A may lead to sebaceous glands, sweat glands secretion decrease, the face does not sweat, this situation patients can be appropriate amount of vitamin A supplement. 2. Skin diseases: patients who suffer from scleroderma, leprosy, radiation dermatitis and other skin diseases will lead to the destruction of the sweat glands on the facial skin, and reduce facial sweating. 3. Congenital hypoplasia of sweat glands: Due to the differences in individual physique, the distribution of sweat glands varies in each person. If the distribution of sweat glands on the face is less, the phenomenon of no sweating on the face may occur, and generally no treatment is needed. If there is no sweat on the face for a long time or the condition worsens, it is recommended to go to the hospital in time to clarify the cause of the disease and then give targeted treatment.