Your hip hurts. Now and then the pain runs down your thigh. Other times it sits in your lower back. You can't tell anymore if it's sciatica, the hip, or a mix of the two.

Lots of people find this confusing — and with good reason. A handful of different structures packed into the same region can produce pain that feels almost identical. This guide will help you figure out where yours is coming from.

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1. Four structures that share the same region

• The sciatic nerve — squeezed either by a herniated disc (in the lower back) or by the piriformis muscle (deep inside the buttock) → true sciatica or pseudo-sciatica
• The sacroiliac joint — the spot where the sacrum joins the ilium of the pelvis → pain that's frequently confused with sciatica
• The hip joint — osteoarthritis or femoroacetabular impingement → hip pain only
• The piriformis muscle — piriformis syndrome → the sciatic nerve gets pinched deep inside the buttock

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2. The main differences at a glance

Feature	True sciatica	Sacroiliac	Hip osteoarthritis	Piriformis
Where it mostly hurts	Lower back → buttock → leg	Sacrum and buttock	Groin and outer thigh	Deep in the buttock → thigh
How far it spreads	May extend to the foot	Seldom past the knee	Groin and outer thigh	Seldom past the knee
Aggravated by	Sitting, coughing, sneezing	Stairs, standing for long periods	Rotating the hip	Sitting for long periods
Eased by	Lying flat	Inconsistent	Resting	Walking, standing
MRI	Herniated disc shows up	Normal or shows sacroiliitis	Narrowed joint space	Normal

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3. Three tests you can do at home to narrow things down

Test 1 — Checking for disc-related sciatica (straight leg raise / Lasègue's sign)

Lie face up. Ask someone to slowly raise your leg while you keep it straight. If leg pain kicks in before the leg gets to 60° → sciatica from a disc is the likely cause.

Test 2 — Checking the piriformis (FAIR test)

Lie face up. Bring the sore leg up to a 90° bend and cross it over your other knee. Stay there for 30 to 60 seconds. If that brings back the pain in your buttock → the piriformis is the likely culprit.

Test 3 — Checking for hip osteoarthritis

While standing, turn your thigh outward (point your toes out). If you feel pain in the groin or along the outer hip → osteoarthritis is the likely cause.

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4. Sacroiliac pain: frequently overlooked

Between 15 and 25% of lower back pain comes from the sacroiliac joint — and yet it rarely gets talked about. You'll usually feel it at the junction of the back and buttock (a little off to one side of the spine rather than in the center), and it flares up when you stand for a long time or climb stairs.

How it's treated: osteopathic manipulation, exercises that stabilize the pelvis, and injections when necessary. Applying heat and red light to the sacroiliac region works just as well here as it does for sciatica.

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5. When sciatica and a hip problem show up together

After 50, it's common to have sciatica and hip osteoarthritis at once. Each one aggravates the other: a painful hip alters how you walk, which puts extra strain on the lower back and makes sciatica worse.

Addressing just one of them only gets you part of the way. It's one reason support that wraps around the hip, pelvis, and lower back all at once tends to work better than a belt that only covers the lower back.

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6. What kind of doctor should you see?

• Primary care doctor — always the place to start; they can send you to the appropriate specialist
• Rheumatologist — hip osteoarthritis, sacroiliitis, long-term sciatica
• Neurosurgeon — herniated disc causing a neurological deficit, severe spinal stenosis
• Osteopathic physician (DO) / physical therapist — piriformis, sacroiliac, and mechanical pain
• Orthopedic surgeon — advanced hip osteoarthritis, femoroacetabular impingement

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7. Support aimed at the hip and lower back

No matter where the pain actually comes from — sciatica, the piriformis, the sacroiliac joint, or the hip — support that wraps around the hip, pelvis, and lower back all at once tends to work better than a belt that only covers the lower back.

Heat (113–149°F / 45–65°C) and red light (660 nm) work on the muscles and nerves across this whole region, regardless of exactly where the pain starts.

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FAQ

How do I find out for certain if it's my hip or sciatica?

An MRI of the lower spine plus an X-ray of the hip can distinguish the two. In real life, a doctor can frequently narrow it down from the physical exam by itself (where it hurts, what makes it worse, the tests). Both can be present at once.

Is it possible to have both at once?

Yes — in fact, it's common past 50. Sciatica and hip osteoarthritis frequently go hand in hand, aggravate each other, and both need to be treated.

Should I worry about sacroiliac pain?

Seldom. It tends to respond well to non-surgical care (osteopathic manipulation, physical therapy, heat, red light). The inflammatory form of sacroiliitis (spondyloarthritis) needs dedicated treatment from a rheumatologist.

Is it possible to confuse hip pain with sciatica?

Yes, very easily. Like sciatica, hip pain frequently spreads into the thigh. The giveaway: pain that comes only from the hip stops above the knee and worsens when you rotate your thigh, not when you cough or sneeze.

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This article is for general information only. To find out reliably where your pain is coming from, talk to your doctor — you may need a physical exam and imaging.