The reason for forehead nerve pain is the following: 1, caused by lack of sleep, fatigue, no good rest and other reasons, after this situation will lead to nerve fatigue caused by forehead nerve pain, through rest and self-mediation can be relieved. 2, may also be caused by eye disease, if suffering from glaucoma or other diseases that cause eye pressure to rise can lead to forehead nerve pain, patients will also appear eye swelling, vision loss, both sides of the sideburns swelling pain and other phenomena. The patient will also experience eye swelling, vision loss, sideburn swelling and pain on both sides, and should go to the ophthalmology department in time to measure blood pressure and other related examinations to make a clear diagnosis. 3, it may also be caused by scalp skin infection, once the scalp canker sores and other skin infections will lead to the involvement of frontal nerve pain, which can be diagnosed through surgical examination.