Hi and welcome,
Hot spot paresthesias are associated with neurological conditions like MS but from my understanding it's also associated with Neuropathy, nerve compression, Vitamin deficiency, medication side effects, alcoholism, Diabetes and there are likely a few other medical and non medical situations that may explain it that i'm unaware of, your best bet to work out what might be causing this would be getting a general check up with your physician.
Hope that helps.......JJ