I have had a variety of tactile hallucinations, and often experience combined visual and tactile hallucinations of things inside my body space. These can vary from large balls of pure love, intelligent beams of light which manipulate things, energy points on my body including the sexual energy points and so on.
Risperidone did help to a certain extent, but I have a sneaking suspicion it did more harm than good. I’ve moved to Orap, which allows a few more sensations to get through the cracks but has fewer other side effects.
As to causes, I like Notmoses’s statement: don’t ask unless you are Ready for Anything.