I suffer from sleep related hallucinations called hypnagogic and hypnopompic hallucinations. The first occurs as you are falling asleep and the second as you are waking up. Mine usually happen when I am stressed and not sleeping well and therefore, wake up on and off throughout the night.
These hallucinations can be visual or tactile and include the perception of sights or sounds that aren’t actually there. Mine are usually of people and the hallucination doesn’t go away unless I turn on a light.
Only twice have I had a tactile hallucination. Once of something tapping me on the back and another of something pressing down on the top of my head. They are really freaky to have even when you know they are not real at the time.
Photo taken with my Pixel 3a XL and processed in Snapseed.