One of the most common origins of hip pain. Arthritis occurs when the cartilage in the hip breaks down. Cartilage is a rubbery substance inside the hip joint that acts as a type of gasket holding the femoral head in place. Without it, the femoral head rubs against the joint creating friction and inflammation.
The tendons in the hip that connect the muscles are prone to swelling when strained. This is a common condition for active individuals – particularly runners. Tendons become inflamed and sore. Athletes experiencing tendonitis may hear a clicking sound when they move their hip.
Hip bursitis recognize by an aching or nagging pain outside of the hip (on the lateral side), because the tight hip flexor muscles and weak gluteal muscles cause the bursa (lubricating fluid sacs) to rub up against the hip bone. This creates inflammation and pain, as the muscles are imbalanced.
Hip fractures can affect more elderly people with osteoporosis (calcium deficiency in the bones). In these cases, the fractures may not be detected at the beginning. Although the pain levels increase and sometimes irradiate to the groin. Other fractures known as stress fractures can occur in situation of repetite application of force, when the bone is weaker than required for a specific activity, for intance: intense running.