(HealthDay News) -- Rheumatoid arthritis (RA) can last for a few weeks to months, or it can last a lifetime.

RA is thought to be an autoimmune disease, in which the body mistakenly attacks its own cells, the Nemours Foundation says.

Symptoms of rheumatoid arthritis may include pain in the wrists, fingers, or knees, and it may cause people to limp. Joints may become stiff and swollen, and a rash may emerge. Another common symptom is a fever that is suddenly very high at night but quickly goes away.

Primary treatments for rheumatoid arthritis are directed at controlling pain and improving joint function. They include physical therapy, exercise and medication.