The common presenting condition is pain in the groin after flexion activity. The patient is usually young or middle age. It can be diagnosed by physical examination and confirmed by x-ray +- MRI. This condition must be detected early before the damage on the labrum progress beyond irreversible damage. The treatment principal is to avoid repeated injury by activity modification, stretching, appropriate exercise, rehab modalities. If the pain progress despite all of the mentioned modalities combined then arthroscopic ( Keyhole) treatment will be indicated. The underlying abnormal shape of the socket and abnormal shape of the femoral head will also be corrected. The torn labrum will be cleaned up or repaired. The key is to restore normal shape of the labrum thereby restoring normal mechanic of the hip joint with its effective suction seal effect.