Is it possible to get amnesia after hitting your head?

Yes: A brain injury serious enough to cause a concussion (loss of consciousness) can cause amnesia for the time immediately before and/or after the injury. The more serious the injury, the longer the period of memory loss. The more serious brain injuries can cause long-term difficulty with short-term memory and learning new material. Already stored memories are more resistant to loss.

Eval: Symptoms of a concussion can include: headache, nausea, vomiting, confusion, blurred vision, slurred speech, weakness, feeling dazed, numbness, lack of coordination, problems with short term memory, dizziness as well as repeating things over and over. You can develop a concussion with or without loss of consciousness. Amnesia can occur with a head injury. For amnesia seek medical eval.