Hello, about 2 weeks ago I was exercising with a thong on and it created shaffing on my bum cheeks, the thong was not tight nor did it ride up. I am now noticing that the top of my bum crack has a deep reddish purple line and almost feels like hundreds of tiny pricks when I touch it. Also when I bend over it feels like its strechting or very tight.

I have extremly good hygeine, i shower everyday and dry properly also use a hypo allergenic lotion all over my body.

Any suggestions?