One of my legs is an inch longer than the other, and occasionally my left hip and right leg hurt with movement, is this juvenile idiopathic arthritis?

See below: No. This likely due to the asymmetry of the leg length causing muscle strain. See your doctor to have the exact length measured and calculated as a ratio of your total leg length. Usually 3.5 to 4% difference is grounds for treatment of some type, usually non-surgical such as a shoe lift in the shorter leg.

No: This is unequal leg lengths. Try a 1/2 inch heel lift to the inside of the shoe of the shorter leg.

See below: As my colleague stated, it is common for patients to have leg length discrepancies, but you may want your leg length discrepancy formally measured so that you can get the correct height for the heel inserts.

No: "idiopathic" means arising spontaneously or without known cause. Having one of your legs longer than the other is called limb length discrepancy and 1 inch is not significant enough to cause permanent damage. Try uses a heel lift on the shorter leg. Hope that helps.

Would check an X-ray: Not likely if only one joint hurts. I would get a hip x-ray if one leg is significantly shorter than the other.

Possibly: Leg length differences can and often happen in kids with juvenile arthritis because inflammation in the affected leg makes it grow faster (but stop growing sooner in life). There are other causes of leg length differences that are not caused by juvenile arthritis. Just having an inch difference in leg length can lead to chronic back and hip pain due to uneven weight-bearing. See a rheumatologist!

Leg length: A leg length discrepancy by itself can cause the symptoms your are experiencing. A corrective shore lift can help significantly with symptoms. See a physical medicine and rehabilitation physician or orthopedic physician for evaluation.

Unlikely, as there -: Are a number of more commoner causes, like a bad posture, a spinal deformity, a cause in the pelvis, all can result in leg length discrepancy. Have you had a growth plate injury of one of the long bones of shorter leg, or a severe infection in such a bone. Get yourself seen by an orthopedist. If no long bones or spine/pelvic causes, then a rheumatologist would be able to help. Good luck.