If you are an avid baseball fan, you no doubt are familiar with hip impingement injuries that take some of your favorite players out of the game. These athletes describe this condition as groin pain when they flex or rotate their hips.
For those of us not earning a living on a baseball field, we may feel pain in our groin after extended sitting or walking. We may notice popping or clicking at the front of our hips. We may also experience pain that radiates along the side of our hips and upper thighs, extending into the buttocks or lower back.
All these symptoms may indicate hip impingement. This condition is also sometimes referred to as hip impingement syndrome, and medically, it is known as femoroacetabular impingement.
This is a mechanical problem of the hip joint that can cause hip pain, groin pain, and/or low back pain. The issue relates to how the ball of the hip fits into the socket of the hip joint.
How the Hip Is Structured
To set the stage for our discussion, we should first review the structure of the hip.
The hip is a ball-and-socket joint. It is also a synovial joint, a type of joint that allows for smooth movement between bones.
The end of one bone within the joint is spherical, forming the ball, while the end of the other bone within the joint contains a rounded depression, creating the socket. Cartilage, ligaments, tendons, and muscles connect these two bones.
A protective layer of cartilage lines the ball and socket to allow the leg to glide smoothly backward, forward, and sideways. The ball is at the tip of the thighbone, known as the femur. An additional ring of specialized cartilage in the socket side of the pelvis (known as the acetabulum) further protects and stabilizes the joint.
What Causes Hip Impingement?
Hip impingement occurs when the alignment and contact between the hip joint ball and socket are abnormal. When these two sides of the hip joint don’t fit together correctly, it can cause injury to the joint as well as the structures that surround it.
Several factors can contribute to the development of hip impingement syndrome:
- Developmental Factors: For some individuals, the socket may develop abnormally as they grow into adulthood. This may lead to a condition known as acetabular retroversion, in which the socket grows too far over the front of the ball of the hip joint.
- Structural Abnormalities: Abnormal bumps, known as cam lesions, can develop at the junction of the hip ball. This often can happen during adolescence, when certain physical activities can stimulate the bone to create cam lesions.
- Trauma: If the thigh bone twists abnormally, it can lead to a condition called femoral retrotorsion, which may lead to hip impingement. Additionally, past hip injuries may alter bone or soft tissue structure, increasing the likelihood of hip impingement.
How Is Hip Impingement Diagnosed?
Diagnosing hip impingement syndrome involves a combination of medical history, physical examination, and imaging studies.
- Physical exam: Physicians test hip movement, looking for pain or limited motion during specific maneuvers.
- X-rays: Provide detailed images of the hip bones and reveal cam or pincer abnormalities.
- MRI: Useful for detecting labral tears or cartilage damage caused by impingement.
- CT scans: Sometimes used for more precise 3D visualization of hip anatomy.
Early diagnosis is crucial, as it enables conservative treatment and may help delay or prevent long-term joint damage.
How Is Hip Impingement Treated?
The treatment approach for hip impingement depends on the severity of symptoms, the degree of joint damage, and the patient’s lifestyle. Your doctor will determine the best starting course of action after a thorough examination.
Non-surgical treatments
- Activity modification: Avoiding activities that trigger pain (such as deep squats or prolonged sitting) can reduce irritation.
- Physical therapy: A structured rehabilitation program may be prescribed that can strengthen the hip muscles, improve flexibility, and restore better movement patterns.
- Medications: Anti-inflammatory drugs may help manage pain and reduce swelling.
- Injections: Corticosteroid injections provide temporary relief in some patients, though they do not fix the underlying problem.
Surgical treatments
When conservative approaches fail, surgery may be considered. The most common procedure is hip arthroscopy, a minimally invasive surgery that uses small instruments to reshape the bone and repair damaged cartilage.
In severe cases where arthritis has already developed, hip replacement surgery may eventually be necessary.
What Is the Long-Term Outlook for Those with Hip Impingement?
With early recognition and appropriate treatment, many individuals with hip impingement can return to an active lifestyle. Non-surgical interventions often provide significant relief, especially for mild to moderate cases. Surgical outcomes are also promising, with many patients experiencing improved function and reduced pain.
However, untreated hip impingement can lead to chronic hip pain and accelerate the development of osteoarthritis. This is why individuals experiencing persistent hip discomfort should seek medical evaluation rather than dismissing symptoms as minor or temporary.
Wrapping It Up
Hip impingement is a common but often overlooked cause of hip pain in young adults and athletes. Characterized by abnormal contact between the ball and socket of the hip joint, it can lead to pain, stiffness, and even arthritis if left untreated.
Understanding the condition — its causes, symptoms, and treatment options — can empower individuals to seek timely care. Whether through physical therapy, activity modification, or surgical intervention, effective management of hip impingement can restore mobility and preserve long-term hip health.