My butt becomes red and irritated when I sit on something hard, like my chair at school, even on a padded surface if its not heavily padded. When I sit directly on it  it hurts and little bubbles will form. I have been told the skin on my butt is producing an allergic reaction. 

 

To avoid pain, I sit in odd positions, and these positions are affecting my posture, making my back hurt.

Over nearly four years, I have been to numerous doctors and dermatologists with no satisfaction. 

I pray someone has a cure or suggestion!