Written by Fairuuz Saleh, Principal Physiotherapist at Phoenix Rehab, AHPC A1301092H.Clinically reviewed by Louise Yow, Principal Physiotherapist & Director, AHPC A1300363H.Last reviewed 3 November 2026.
Five months after the hip replacement, the hip itself feels fine. It is the thigh that aches for the first few steps out of the chair. Is that normal, and who do you ask?
The thigh is often where pain is felt rather than where it starts. This page covers the signs that mean a doctor first, thigh pain after hip surgery, an ACL graft or spine surgery, what each area of the thigh usually points to, the burning patch on the outer thigh, and what to do when it keeps aching with nothing torn on the scan.
What causes thigh pain?
Thigh pain usually comes from a muscle strain or bruise, the hip joint, or a nerve from the lower back or groin. Where it hurts narrows it down: front, back, inner and outer thigh each have their usual causes. A swollen, hot, painful thigh, or one that cannot take weight, is a doctor first.
Key takeaways
- Thigh pain usually comes from a muscle, the hip joint or a nerve from the back.
- A swollen, hot, painful thigh on one side is treated as a possible blood clot until a doctor has ruled it out.
- A new dull thigh or groin ache after years on bone-strengthening medicine is a question for your doctor the same day.
- Thigh pain after a hip replacement is a question for your surgeon, especially if it is new or getting worse.
- A burning or numb patch on the outer thigh with no muscle soreness is usually a nerve, called meralgia paresthetica.
- A physiotherapist tests the back, the hip and the nerve as well as the thigh.
First, the signs that mean a doctor, not this page
- Call 995 if you are suddenly short of breath, have chest pain or cough up blood, especially with a sore or swollen leg.1
- Go to the emergency department now if one thigh is swollen, painful, warm, or red or darker with no injury to explain it, especially after surgery, a cast, bed rest or a long journey.1 The same goes if you cannot put weight on the leg after a fall, if the thigh is tense and hard with severe pain after a heavy blow, if the foot turns cold or pale, or if you have new numbness between the legs, trouble passing or holding urine or stool, or weakness in both legs.
- See a doctor the same day for a new dull ache in the thigh or groin that is worse taking weight, if you have taken bone-strengthening medicine such as a bisphosphonate for years. Put any question about that medicine to the doctor who prescribed it.4 The same goes for a deep thigh or groin ache in a runner or recruit that grows with every run or hurts when you hop, because a stress fracture at the hip end of the thigh bone can break through, new thigh pain with a fever or a hot red patch of skin, a leg that is giving way, and new or worsening thigh pain after a hip replacement.
- See a doctor soon for a lump in the upper inner thigh or groin, upper inner thigh pain with pelvic pain or unusual bleeding or discharge, or pain at night no matter how you lie, unexplained weight loss, or a history of cancer.
None of these? Then the rest of this page is for you.
Thigh pain after surgery
After a hip replacement. Thigh pain can occur after a hip replacement, and it has been studied most with cementless stems, where it often shows up on the first steps after sitting.2 New or worsening pain goes to your surgeon first, who decides whether an X-ray is needed. Once they are satisfied, the part we work on is the hip muscles, because a weak hip leaves the thigh doing more than its share on stairs and on standing up. See physiotherapy after hip replacement and the Hip Fracture Recovery Program.
After an ACL reconstruction. If the graft came from your hamstring, the back of the thigh often feels tight or sore in the early weeks, and hamstring strength can lag behind the other leg for months. If it came from the quadriceps tendon, the front of the thigh is the side that lags. Your surgeon’s protocol sets what the knee may do. More on the ACL injury.
After spine or hip arthroscopy surgery. Some ache or tingling down the thigh can linger after a microdiscectomy as the nerve settles. New numbness or weakness goes to your surgeon the same day. Spine surgery is also one of the listed causes of a numb patch on the outer thigh, covered below.3 See the Lumbar Microdiscectomy Recovery Program and the Hip Arthroscopy and FAI Recovery Program.
Had an injection in the back or the hip?
Whether an injection suits you is a question for your doctor. Pain easing in the thigh afterward does not tell you what the hip or the back can take. That is measured separately. More on physiotherapy after an injection.
Pulled or bruised: a thigh that went at a moment you can name
A sprint, a kick or a knock usually means a muscle. The front of the thigh is covered in quadriceps strain, the back in hamstring strain, the inside in groin strain, and a direct blow in dead leg. Each of those pages has its own timeline and return tests.
What each area of the thigh usually points to
| Where, and what you notice | What it usually points to | Who checks it |
|---|---|---|
| One thigh swollen, warm and painful | A blood clot, until a doctor has ruled it out | Emergency department |
| Deep, dull, worse with every run or on taking weight | A stress fracture of the thigh bone | A doctor, the same day |
| Front: sudden pain on a sprint or kick | A quadriceps strain | A physiotherapist |
| Front and groin crease: stiff getting out of the car or putting on socks | The hip joint, often arthritis, or the hip flexor | A physiotherapist. A doctor if an X-ray is needed |
| Back: sudden pain sprinting or reaching | A hamstring strain | A physiotherapist |
| Back: from the buttock, sometimes with tingling, worse sitting | A nerve from the lower back, or the buttock | A physiotherapist or doctor |
| Inner: after a kick or a change of direction | An adductor strain | A physiotherapist |
| Upper inner: with a lump, or with pelvic symptoms | A hernia or a pelvic cause | A doctor soon |
| Outer and upper: sore lying on that side | A gluteal tendon or hip bursitis | A physiotherapist |
| Outer: burning or numb patch of skin, the muscle itself not sore | Meralgia paresthetica | A physiotherapist or doctor |
| Outer, low down near the knee: at the same point in every run | The iliotibial band | A physiotherapist |
More on hip pain, hip flexor strain, hip bursitis, sciatica, piriformis syndrome and outer knee pain.
Why does my thigh hurt when I walk?
The usual reasons are the hip joint, a strain that has not finished settling, or a nerve from the lower back. In someone who has been running more, or taking bone-strengthening medicine for years, the thigh bone has to be considered, and that is a doctor’s question the same day. In older adults, thigh pain on walking is often the hip. A hip problem commonly shows up in the groin and front of the thigh.
A burning patch on the outer thigh
Meralgia paresthetica is a sensory nerve problem that causes numbness or burning in a patch on the front and outer thigh. It has been linked to obesity, pregnancy and other causes of raised pressure in the abdomen, spine surgery and pelvic surgery.3 Tight belts and heavy tool belts are the everyday culprits people recognize. It does not weaken the leg, so a thigh that is weak as well as numb needs a doctor to look further. A physiotherapist checks the back and the hip to make sure it is not coming from higher up. Nerve tests and injections are a doctor’s decision.
Why the thigh keeps aching when the scan says nothing is torn
The thinking goes: it hurts in the thigh, so treat the thigh. Roll it. Massage it.
Three months of the foam roller on the floor of the condo gym. It feels looser for an hour. Then you step up onto the MRT or climb out of the Grab, and it is back. You have swapped the Saturday run for a walk, you stand on the escalator now, and your review with the doctor is next month with nothing new to report.
The thigh is where it is felt, not always where it starts. The hip joint and the nerves from the back both send pain there. Has anyone measured how far the hip turns against the other side, tested the nerve along its length, and counted single-leg sit-to-stands on each leg? If not, the roller has been working on the place that hurts, and nobody knows yet whether that is the place with the problem.
What a physiotherapist does with it
Finding the real problem is half the battle. Treating it is the other half.
At the Assessment & Treatment, a physiotherapist asks where and when it hurts, in your words, and checks first for anything that needs a doctor. Then come the tests a label does not give you: the lower back and the nerve, hip movement against the other side, the muscles of the thigh and hip tested one by one, single-leg strength counted on each side, and how you walk, climb and run. If anything points to a bone, a clot or a hernia, we tell you and write to your doctor. Scans and injections are theirs.
Most of the 45 minutes is treatment: hands-on work for the hip, back or thigh, and a loading program measured up at each review. You leave knowing which stage you are in, what is limiting you, and a written plan.
Every appointment is one to one with your physiotherapist for the full 45 minutes, at five clinics: Orchard, Tampines, Serangoon, Tanjong Pagar and Jurong East. Bring your surgeon’s protocol if you have had an operation, any scan report, and the date of any injection.
Questions about thigh pain
What could be causing pain in my thigh when I walk?
Usually the hip joint, a strain that has not settled, or a nerve from the lower back. If you have been running more, or have taken bone-strengthening medicine for years, the thigh bone has to be considered, and that needs a doctor the same day.
What causes upper inner thigh pain in women?
Common causes are an adductor strain, the hip joint and a nerve from the back. A lump can mean a hernia, and pain with pelvic symptoms, unusual bleeding or discharge can have a pelvic cause. Those last two need a doctor soon.
When should I worry about thigh pain?
Go to the emergency department now for a swollen, hot, painful thigh, a leg that cannot take weight after a fall, a cold or pale foot, or numbness between the legs with bladder or bowel changes. Call 995 for sudden breathlessness or chest pain. A deep ache that grows with every run also needs a doctor the same day.
Can a back problem cause thigh pain?
Yes. Nerves from the lower back supply the thigh, so a back problem can cause pain, tingling or weakness there, sometimes with little back pain. A physiotherapist tests the back and the nerve as well as the thigh.
What exercises help thigh muscle pain?
It depends on the cause. A settled strain usually needs gradual strengthening, and a nerve or hip problem needs something different. Go to the emergency department now if the thigh is swollen, hot and painful, and see a doctor the same day if the pain grows with every run. Strength counted on each side is a better guide than how it feels.
Months of rolling the thigh, and the first steps out of the chair still catch? Get Assessed & Treated, and leave knowing whether it is the thigh, the hip or the back, which stage you are in, and what the next stage asks of it.
Sources: 1. NHS. Deep vein thrombosis (DVT). nhs.uk. 2. Do cementless short tapered stems reduce the incidence of thigh pain after hip arthroplasty? Systematic review and meta-analysis. 3. Harney D, Patijn J. Meralgia paresthetica: diagnosis and management strategies. Pain Med. 2007;8(8):669-677. 4. Shane E, Burr D, Abrahamsen B, et al. Atypical subtrochanteric and diaphyseal femoral fractures: second report of a task force of the American Society for Bone and Mineral Research. J Bone Miner Res. 2014;29(1):1-23.
Where are you with this right now?
1. It is settling on its own
Most strains and flare-ups settle over weeks with sensible load management and a return to normal movement. Improvement is judged over a month, not over a day, and good days and bad days inside that are usual. If you are doing more this month than last, and sleeping better, it is behaving the way it should. You do not need us for this, and we would rather say so.
2. It has stopped improving
You have adapted without noticing. The other side takes the load, you plan movements you used to make without thinking, and you have quietly dropped things you used to do.
What our patients say
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Pain is the first thing to leave. Movement and strength are the last things trained back, and most people stop before that part is done. That is the gap worth measuring, and it is not measured by how you feel on the day.
The Stalled Recovery Review is three appointments over three weeks with the same therapist, because what the body does under load cannot be read in one visit. The first finds what is limiting it. The next two measure how it responds.
3. You have had surgery, or you have a date
After a hip replacement, a hip arthroscopy, an ACL reconstruction or a microdiscectomy, new thigh pain goes to your surgeon first. Once they are satisfied, bring their protocol and we work inside it. See physiotherapy after surgery, or all the recovery programs, hand and physiotherapy.
All of it runs on the same four stages. The Phoenix Recovery Protocol explains what each stage works on and what you have to meet to move up. No referral needed to start.
Next step
Find out which stage you are in
Pain is the first thing to leave. Movement and strength are the last things trained back, and most people stop before that part is done. One Assessment and Treatment is a single 45-minute appointment at $230, nett, no GST. Your therapist finds what is actually limiting you, treats it in the same appointment, and you leave with your current stage and a written plan.
Prefer to phone? Each of our five clinics has its own number on the clinics page. No referral needed to book.
Related reading
Where we are
Clinics across Singapore
ORCHARD
400 Orchard Road #12-12
Orchard Towers, S238875
NS22 Orchard MRT
Physiotherapy and hand therapy in Orchard →
WhatsApp 8800 1830TAMPINES
9 Tampines Grande #01-20
Asia Green, S528735
EW2DT32 Tampines MRT
Physiotherapy and hand therapy in Tampines →
WhatsApp 8780 9608SERANGOON
265 Serangoon Central Drive #04-269
S550265 · Lift C only
NE12CC13 Serangoon MRT
Physiotherapy and hand therapy in Serangoon →
WhatsApp 8892 4121TANJONG PAGAR
10 Anson Road #02-77A
International Plaza, S079903
EW15 Tanjong Pagar MRT
Physiotherapy and hand therapy in Tanjong Pagar →
WhatsApp 8227 7074JURONG EAST
2 Venture Drive #02-02
Vision Exchange, S608526
NS1EW24 Jurong East MRT
Physiotherapy and hand therapy in Jurong East →
WhatsApp 8242 7340