Welcome to Health Care Magic
Pectineus is the name of a muscle - not disease. At times, it could be injured and may cause pain.
There are massage
techniques, which may help. Trigger points are at times identified. and may be managed.
Orthopaedician (particularly the one focussing on hip and spine) and/or Physiotherapist alone or in combination could help.
Pelvic and rectal examination
/ basic investigations are to done not to miss any associated problem.
Wishing speedy recovery