(HealthDayNews) -- If your child complains of aches and pains, you might dismiss it as nothing serious. The Hospital for Special Surgery in New York says that may be a mistake.

The hospital says more than 70,000 children in the U.S. suffer from juvenile rheumatoid arthritis. And the sooner it's diagnosed -- through a blood test and medical exam -- the better it can be treated.

Symptoms include hot, swollen, painful joints that cannot move as much as they should, morning stiffness, high fevers and a rash. It's common for the symptoms to go away and and come back after a day or so.

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