If you have a bumpy bun on your head, you need to carefully observe the appearance of the bun and the conscious symptoms to determine what factors are involved.1. If the bun is a red papule-like change, accompanied by significant pressure pain, consider the possibility of folliculitis on the scalp. In this case, you can choose to surgically remove it, and you can do pathological examination of the excised tissue to determine its specific nature through microscopic histological observation, and if necessary, to carry out a second enlargement of the excision.