I remember even seeing the "bugs" crawling under the skin of my hands and arms - They'd all go towards my back, and electrocute my spine.

This can happen especially with extreme stress. Easing stress is the best thing and good sleep every night + Some sort of antipsychotic can be important (Until possibly the stress goes away).

But I don't know much else about tactile hallucinations. I could be completely wrong. Hopefully someone else with this experience can help. Hugs.

They aren't real bugs though.. Remember that..

And in places/countries where it's warm, and there's lots of real bugs that CAN crawl on someone, it's more likely - Or if they've moved to a place where there aren't any/winter/fear of them happening in the spring + stress = Sensory deprivation of what it used to be, causing tactile hallucinations (I think.. I could be wrong..)