Femoroacetabular Impingement (FAI)

FAI describes a hip shape where the ball and socket meet early at the front when you bend deeply. Your orthopedist manages the bone shape, and the tight muscles that sharpen the pinch are what I treat.
Illustration of human hip anatomy

The Clinical Reality

Femoroacetabular impingement, or FAI, means the ball of the thigh bone and the rim of the socket contact each other early. It usually shows up as groin pain with deep sitting, squats or pulling a knee toward the chest. Many people have this bone shape on imaging without pain, so symptoms depend a lot on how the hip is loaded.

When the front of the hip keeps getting pinched, the surrounding muscles tend to tighten to protect it. The iliopsoas, adductors, deep rotators and TFL (tensor fasciae latae, a small muscle at the outer front of the hip) are the usual ones. That tension can press the joint together further and spread pain into the groin or the side of the hip.

Your orthopedist manages the impingement itself, including decisions about imaging, injections or surgery. My part is the pain and the guarded muscles around the joint, which I treat with dry needling, a form of acupuncture. Near the front point of the pelvis, a tight sartorius and TFL can crowd the lateral femoral cutaneous nerve. Needling them gives that nerve more room.

What might have been missed in standard care

The usual path includes imaging, anti inflammatory medication, rest and a physical therapy program, and sometimes a conversation about surgery. Those are reasonable steps. Exercise can still flare a hip whose surrounding muscles are guarding hard, and medication quiets pain without loosening them. New York doesn’t give physical therapists or chiropractors dry needling as a tool. Needling those muscles adds something different to your existing care.

Signs & Symptoms

Do any of these sound familiar?

Groin pain when bending deeply

Squats, tying shoes and sliding into a low car seat bring it on most.

Sharp pinch at the front of the hip

It catches at the end of the bend, especially if the knee also turns inward, and can ache for hours afterward.

Stiff first steps after sitting

After desk time or a long commute, the first few steps feel tight and sore before it eases.

Inner thigh tightness that stretching won't release

A pull near the groin crease, often worse with lateral work or wide stance lifting.

Overworked outer hip

The side of the hip ends up compensating and can ache like a gluteal tendon problem.

Treatment Methods

Orthopedic Acupuncture & Dry Needling

Target stubborn pain at the source
I treat the muscles, tendons, and joints directly to release tight tissue, reduce irritation, and help restore comfortable, natural movement.

What's often behind it

The places I check first

Iliopsoas

This deep hip flexor can tighten to guard the front of the joint, and that tension sharpens the pinch when you bend.

Adductor longus and gracilis

These inner thigh muscles often get stubborn with cutting, skating motions or wide stance strength work.

Deep hip rotators

When these small muscles behind the hip are tight or poorly coordinated, the ball moves differently in the socket during squats and pivots.

Lateral femoral cutaneous nerve, crowded by muscle

Tight tissue at the sartorius and TFL can press on this nerve near the pelvis, adding burning or numbness on the outer thigh.

What happens at your first visit

What I'm checking and why

I ask which positions bring on the pinch, how long you can sit, and what your orthopedist or PT has already found. Then the exam:

  • Pressing on the iliopsoas, adductors, TFL, deep rotators and upper hamstrings to find guarding and tender spots.
  • Moving the hip into flexion and inward rotation to separate joint pinch from muscle restriction.
  • Checking squat depth, step downs and rising from a chair to find where symptoms start.

Because your orthopedist diagnoses and manages FAI, I plan around their guidance and your PT’s program. If my exam raises a question worth bringing to them, I’ll let you know and share it.

What to Expect

From your first visit on
First visit
I examine the hip and then needle the guarded muscles that reproduced your pinch, all in that first appointment.
Weeks 1 to 6
FAI care usually spans about 4 to 6 weeks. I follow how deep you can bend before the pinch starts and how the hip responds to PT. Treatment adjusts as that changes.
After that
Spacing visits further apart lets the hip keep its new range on its own. The pace varies with bone shape and activity, so this outline is typical, not guaranteed.

Frequently Asked Questions

What people ask me before booking

Not necessarily. Many people have this hip shape without pain, and scan findings don’t always match how much it hurts. Muscle tension and how the hip is loaded play a large part. Interpreting the imaging belongs with your physician.

No. Needling doesn’t change bone. Its aim is to ease the guarded muscles around the joint so the hip tolerates more range and load within the shape it has.

I needle the iliopsoas, adductors, TFL and deep rotators that reproduce your pinch. As those muscles let go, the joint is pressed together less and the nerves nearby have more space. The aim is to make your rehab exercises easier to tolerate.

I compare what happens when I press on the muscles with what happens when the hip is moved into certain end positions. If pressing reproduces your familiar pain, muscle is likely a big part. If only the joint positions do, the joint is playing a larger role. Usually it’s some of both.

Not automatically. Changing squat depth, stance, tempo or weekly volume usually works better than full rest. I’ll help you find the positions that spike symptoms so you can adjust them while the hip settles.

A traumatic injury, being unable to bear weight, or numbness or weakness that keeps spreading need prompt medical care. So do fever, unexplained night pain, and a hip that suddenly catches or gives way.

Not sure if I can help?

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Evidence-based acupuncture and dry needling on the Upper West Side. From chronic pain and headaches to pelvic floor dysfunction, Dr. Jordan Barber pairs the highest level of training with care that actually listens.

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