Painful bumps after wearing wig, help :(

So I have always had really bad pain when wearing wigs/wig caps. And chopped it up to having a fat head. I ended up alleviating most of this pain by wearing wig grips under the wig cap to provide a cushion. However, since wearing them I get these really painful bumps. I can’t tell if they’re pimples, friction bumps or an allergic reaction and was wondering if anyone else has gotten them or knows how to deal with them?