Hitting your head on your own will not cause a brain bleed in most cases. This is because the trauma of hitting your own head is not strong enough to cause a brain bleed. However, it is not absolute, if the impact area is weak, such as the bilateral temporal part of the head and the back of the head, it may also lead to brain hemorrhage. A CT scan of the skull is necessary to determine whether there is bleeding in the skull and whether there is a fracture of the skull. If the patient develops severe headache, dizziness, nausea, vomiting, paralysis of limbs, seizures, etc. after the injury, the possibility of bleeding is very high. It is important to go to the hospital immediately and have a cranial CT examination, so as to avoid delaying the condition, or even endangering life.