Free guide · Scarlet Beast En español →
Juvenile arthritis (JIA): the signs in a child, the types, getting a diagnosis, treatment, and living with it
For a parent or caregiver whose child limps in the morning or has a swollen, stiff knee or ankle, a child with a fever every day and a rash that comes and goes, anyone just told their child has juvenile idiopathic arthritis (JIA), and young people who have it. The National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS, part of the NIH) says JIA is the most common type of chronic, or long-lasting, arthritis that affects children, and that it begins when the immune system becomes overactive and creates inflammation. With treatment, most children reach periods with no symptoms (remission), and sometimes the disease goes away permanently. NIAMS says it is important to see a doctor early if your child has swollen or stiff joints, because delaying therapy can lead to joint damage. This page passes on, by name, what NIAMS says: the signs in the joints, eyes, skin and growth, who gets it, the types and the cause, how it is diagnosed and who treats it, the kinds of medicine, therapy and check-ups, and what helps day to day, at home and at school. It builds the words to say to a provider, and prints a card for the visit.
Right now
- A child who has trouble breathing or is very hard to wake: call 911 (ours).
- A child’s eye that hurts, turns red, or is bothered by light, or vision that blurs or changes: get care the same day, at an emergency room if you cannot reach a provider (ours). NIAMS says uveitis, an eye inflammation that often occurs in children with JIA, can lead to cataracts, glaucoma and vision loss if left untreated.
- One joint that suddenly turns hot, swollen and very painful, above all with a fever, or a child who will not put weight on a leg: get care the same day (ours).
More help
- Related: A child’s health · Arthritis · Psoriatic arthritis · A child’s fever · Pain, bones and joints.
- School and day to day: Help at school · Letters to the school · Eye care · Symptom diary · Medicines list · Anxiety · Depression.
- Care and costs: When you need a doctor and can’t pay · When medicine costs too much · Get ready for the appointment.
- In a crisis: Help right now (988, 911). All our free tools.
Pain, a bone or a joint, and not sure this is the right page? The pages on this site for back pain, arthritis, pain that lasts, headaches, broken bones and sickle cell, on one list.
Looking after a baby or child? The pages on this site for a baby or child, on one list.
This page and its wording were written with AI (Claude) for Scarlet Beast (our AI policy). No doctor or nurse has reviewed it. The facts were read on October 15, 2026 on NIAMS’s Juvenile Arthritis page, both parts: Overview, Symptoms, & Causes and Diagnosis, Treatment, & Steps to Take (NIH, last reviewed July 2024), and on its Spanish twin, Artritis juvenil (October 2024), which carries the same facts. Ours: calling 911 for a child who has trouble breathing or is very hard to wake; getting care the same day, at an emergency room if you cannot reach a provider, for a child’s eye that hurts, turns red or is bothered by light, or vision that blurs or changes; getting care the same day for one joint that suddenly turns hot, swollen and very painful, above all with a fever, or a child who will not put weight on a leg; writing down which joints, since when, and any fevers; keeping a list of every medicine; not stopping or changing a medicine on your own; putting school requests in writing; asking what a test or treatment would change and what it costs; and the order of the steps. What we left out: any medicine’s name, any brand or dose, any supplement, remedy or product, how common each type is in one region, and NIAMS’s research pages. This page saves nothing and loads no trackers.