Osteoarthritis

I found this article on wikipedia today. It matches my symptoms perfectly.

The main symptom is acute pain, causing loss of ability and often stiffness. “Pain” is generally described as a sharp ache, or a burning sensation in the associated muscles and tendons. OA can cause a crackling noise (called “crepitus”) when the affected joint is moved or touched, and patients may experience muscle spasm and contractions in the tendons. Occasionally, the joints may also be filled with fluid. Humid and cold weather increases the pain in many patients.

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usually feel worse, the more they are used throughout the day, thus distinguishing it from rheumatoid arthritis.

It’s supposed to be an old people disease ~_~ Like, 60+ years old. Sometimes even walking around the house can trigger it. Or shaking legs. Bleah =(