Sweating all the time on the face may be caused by emotional changes, high environmental temperature, improper diet, hyperthyroidism and other reasons. 1. Emotional changes, high ambient temperature: such as nervousness, anxiety, fear and other emotions or high ambient temperature, will lead to the body’s blood circulation speed significantly accelerated, resulting in increased secretion of sweat glands, thus appearing on the face of the situation has been sweating. 2. Improper diet: If you eat too much spicy, stimulating or greasy food, it will stimulate the sweat glands to increase secretion, thus the face has been sweating. 3. Hyperthyroidism: at this time, the body’s thyroid hormone levels rise, the body is in a high metabolic state, so there may be sweating all the time, often accompanied by irritability, insomnia and other symptoms. If the face has been sweating, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause, give targeted treatment or standardized treatment.