The painful pressure on the head caused by a bag needs to be clarified whether there is a history of trauma. If there is a clear history of head trauma, it is considered that the trauma caused local tissue edema and congestion in the scalp, and the tiny blood vessels ruptured and blood spilled out of the surrounding tissues, thus causing bruising and pain. If the pain is caused by trauma, it is also necessary to determine whether it is accompanied by neurological manifestations such as dizziness, headache, nausea, etc. A cranial CT is required to exclude brain parenchymal lesions. If there is no clear history of trauma, it is considered to be caused by local soft tissue infection. It is usually caused by folliculitis, etc. The typical manifestation is local scalp tissue redness, swelling, heat and pain. Local pain in the scalp caused by infection requires the application of antibacterial drugs. Generally choose cephalosporin oral with erythromycin ointment topical treatment.