The forehead is full of closed mouth acne, can be improved through general treatment, medication and other methods. 1. General treatment: forehead full of closed mouth acne, first need to do a good job of local care, do not use stimulating cosmetics. At the same time, you need to avoid eating too greasy or spicy food, maintain a good routine, avoid too much tension and overwork. This will help reduce the secretion of sebaceous glands and reduce the incidence of closed mouth acne. 2. medication: forehead full of closed mouth pimples, belongs to a more common type of acne, considered with the follicle sebaceous gland opening blockage. In this case, you can follow the doctor’s instructions for external use with internal use of vitamin A drugs for treatment, such as vitamin A ointment, adapalene gel, etc.. Vitamin A drugs can dissolve keratin, but also can inhibit sebum secretion, to improve the symptoms of closed mouth acne. If the forehead is full of closed mouth acne, if it is not relieved for a long time and recurring, it is necessary to consult a doctor in time, and under the guidance of the doctor to give the appropriate medication for treatment.