What causes severe joint pain in both hands, knees, and feet? Swelling, reddness, and all of areas are hot to touch, with severe fatigue. Thanks.

Rheumatoid Arthritis. At your age it is more likely to be rheumatoid arthritis or another collagen disease like lupus etc. Only way you can find out is by consulting your family physician or a rheumatologist. Need detailed history, physical examination, xrays and/or blood test. Osteoarthritis usually presents at later date and pain and symptoms are limited to the joints only due to degenerative changes in the joints, seemd.
Arthritis. These symptoms are likely related to arthritis. To know which kind of arthritis medical evaluation by a rheumatologist is necessary.