I had a severe head injury over 40 years ago and I still have wierd sensations. I've had tingling, crawling sensations and the worst was the feeling of what felt like cold water dripping on my head. Most have subsided but even after all this time I'll sometimes feel like a bug is crawling over my head. Sometimes my head feels tight and it just hurts to the touch. None of these sensations started until months after the injury.