Does anyone know about an itching/burning/or painful/irritating tingling of the skin?

I have had this off and on in small instances for about a year. Latley it HAS NOT been going away, (i’ve been having this itching/burning every 2 days or more) and It feels like an itch but more irritating and Painful. It is in different parts in areas big and small all over my body and not always in the same spot, and not always the same size area of irritation. I feel like it may be caused by heat or breathing conditions or when I’m nervous. Is it deeper(Nerve related)? Is it like an Immunal response? Is it Shingles? Parasites?? Diet?? Please help me