Acne in medicine refers to acne, acne is a kind of follicle sebaceous gland unit and other chronic inflammatory skin disease, stay up all night acne on the forehead, can be eliminated through general treatment, drug treatment, fruit acid treatment and other methods. 1. General treatment: first of all, pay attention to change the bad habit of staying up late, pay attention to go to bed on time, keep the diet light and regular; secondly, pay attention to good skin cleaning, can be appropriate to use warm water and neutral soap to wash the face skin, can reduce the blockage of oil. 2. Drugs: just simple forehead acne, can be used to apply drugs mainly, such as vitamin A acid drugs, can effectively inhibit the secretion of sebum, reduce the emergence of acne, commonly used drugs are adapalene gel, tazarotene cream, etc.; In addition, you can also appropriate use of azelaic acid applied to inflammation as well as acne have the effect of reducing inflammation after the phenomenon of hyperpigmentation. 3. Fruit acid treatment: fruit acid can be applied to the local skin, reducing the adhesion of keratinocytes, thereby accelerating the shedding of epidermal cells and renewal, so as to achieve the therapeutic purpose. Once the phenomenon of staying up all night forehead acne, you need to go to the hospital in time, under the guidance of the doctor standardized treatment.