femoroacetabular impingement

Femoroacetabular impingement (FAI) is a condition where abnormal contact occurs between the thigh bone (femur) and the hip socket (acetabulum) during movement. This usually happens because of bony irregularities—either extra bone formations or a misshapen joint surface—that cause the bones to rub against each other. Over time, this friction can damage the joint cartilage and labrum, leading to pain, stiffness, and reduced hip function. FAI is common in active individuals and can often be managed through physical therapy, activity modification, or surgery to correct the anatomical issues and alleviate symptoms.