This started about 2 or 3 days ago but out of nowhere the top part of my butt crack is hurting now if only I sit on that part or if I touch a bit hard(meaning Im touching the part and a bit pushing). I checked in the mirror and it seemed that it was a bit red at that area. I am an 18 year old male and I usually sit on my chair in my room to use the laptop. Is this the cause of me sitting too much in weird positions? Like I dont sit up straight, I like sitting sluggishly, taht is the part where it hurts usually is the part touching the chair base which if you sit straight it doesnt, and I like putting my feet up on the desk because I feel more comfortable and I cant sit still for 10 minutes. What might be the cause of my pain which is not too bad right now but it feels like it is getting worse. I can handle pain but I am concerned about my health.