Juvenile idiopathic arthritis 

Juvenile idiopathic arthritis is the most common chronic rheumatic disease in children, characterized by persistent joint inflammation before the age of 16.

Symptoms include joint pain, swelling, stiffness, and sometimes systemic features such as fever or rash. While the exact cause is unknown, it is thought to involve immune dysregulation and genetic susceptibility. Early recognition and treatment are crucial to prevent long-term joint damage, support normal growth, and maintain function.