Symptoms of being hit on the head by a heavy object depend largely on the head injury. If the head injury is mild, the patient may only show symptoms of concussion, and may have transient impairment of consciousness for no more than half an hour; some patients may also have retrograde amnesia, transient brainstem symptoms, such as may appear pale, sweating, decreased blood pressure, etc., and may also have headache, dizziness, nausea, vomiting, weakness and other symptoms. If the head is hit by a heavy object damage is more serious, there may be a combination of intracranial hemorrhage, the patient may have consciousness disorder, if the bleeding is large, the patient may rapidly coma, and may show symptoms such as increased blood pressure, unstable respiratory rhythm. For patients whose heads are hit by heavy objects, they usually need to go to the hospital for treatment.