I've been having unusual muscle pain for the past two weeks now. I normally don't do any excercise but lately my leg and arm feels like I ran 5 miles. My hands would be sore and I can't grip anything tight as usual. Even walking on the stairs are giving me a hard time.   This happens mostly in the morning and will go away in a couple of hours but can happen anytime when i lie down for too long.

Any advice for me please?

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Male , Age: 31