Hi!, My Husband Is Uncircumcised And Recently Has Been Getting

Hi!, My husband is uncircumcised and recently has been getting cracks on his foreskin either after or during sex or sometimes when he pulls back the skin to pee. They last for a few weeks and when they heal things seem to be okay until we try to get intimate again or if he pulls back the skin to hard. What could be happening? And what can we do?