If you have acne on your forehead, you can try to adjust your daily routine, avoid staying up late, eat less stimulating, greasy, cold and spicy food, eat a light diet and pay attention to facial cleanliness, the acne may become smaller or disappear. If there is acne on the forehead and it is not easy to remove, it may also be acne, mainly related to excessive hormonal exuberance, excessive oil secretion, abnormal keratinization of the hair follicle opening and infection by P. acnes bacteria, etc. You can follow medical advice to use topical acne creams or anti-inflammatory drugs, etc. There are different treatments for different degrees of acne. 1. Mild acne: only acne, this kind of acne only needs to follow medical advice to use topical drugs, such as adapalene gel. 2. Acne: In addition to acne, there are also papules and papulopustular rashes, which are considered moderate acne. Topical medications such as adapalene gel and clindamycin gel can be used as prescribed by the doctor, plus oral antibiotics; 3. Severe acne: There are not only acne, papules and papulopustular rashes but also cysts and nodules.