Pain in the groin with a snapping noise suggests something is torn or loose inside the joint or possibly a muscle is snapping in front of the joint itself. Pain that is sharp, stabbing or has a catching sensation in certain positions may be due to a torn labrum or an impingement. Sometimes a torn labrum will make a loud clicking noise.
The labrum is the soft edge of the socket. It gets damaged easily when the hip is unstable or shallow. Diagnosis is usually made with an MRI with dye injected into the joint. Sometimes a labral tear can be repaired with minimally invasive surgery using an arthroscope. Other times, there may be a fracture or the socket itself may need to be deepend or re-positioned by dividing the bone around the socket.