Hi, I've been experiencing some burning sensation on my back neck hair on the left side, i first felt it when i was feeling tense/stressed about smth. When i touched the burning area i felt bumps in there, and when i took a pic of it it's looks like reddish lump. It doesn't itch or anything, it just burns. And i don't feel it all the time, just when I'm getting stressed out or just tense. Can someone explain what's happening to my skin? Any answer will be highly appreciated. Thanks