Pimples on forehead, usually caused by acne, can be treated by skin cleansing and medication. 1. Skin cleansing: Some patients may have a high secretion of oil in their skin, which can easily lead to clogged pores, thus resulting in acne on the forehead. Therefore, we must pay attention to facial cleaning, keep the face dry and clean. 2. Medication: If the patient’s symptoms are more serious, you can follow the doctor’s instructions to use antibiotic drugs for treatment, such as doxycycline, minocycline and so on. You can also use drugs to inhibit sebum secretion, such as isotretinoin capsules and other drugs. Therefore, the situation of acne on the forehead, usually can be eliminated by itself, if the symptoms have not been able to subside, it is recommended to go to the regular hospital in time, clear cause, for treatment.