I got this one hyper pigmented spot on my stomach. and a few other places on my body. The one on my stomach if I put anything with excessive heat like a phone or computer on it, it gets itchy and swells (does not itch if I am out in the sun) from a white to a more red irritation and takes about 15 minutes to subside. The other white areas don't really itch they are just there about 4 to 5 very small pigments. What am I dealing with?