Other issues, such as arthritis or pain in the psoas muscle (which helps flex the hip joint), can cause similar symptoms.

The examiners were blinded to the symptoms and identity of the subjects. The subjects were examined twice by each examiner in random order. The examinations included evaluation of adductor muscle ...

White adds that in addition to overuse and inactivity, osteoarthritis and rheumatoid arthritis can also contribute to pain and stiffness in the psoas muscle and surrounding muscles. Be sure to see ...