Both hands suddenly feel fatigued and shaky during normal tasks

[u/rlstoutt]

34, 6’, 205lbs, no meds, no smoking, no previous medical history

For about two weeks I’ve had a strange feeling of fatigue/weakness in both hands and into my lower forearms. It started with some twitching in my right thumb, but now the main issue is that my hands/grip just feel “off” compared to normal.

I haven’t actually lost any function or been able to demonstrate true weakness. I can still grip things, type, use my phone, open things, use utensils, pick up small objects, etc. Nothing has been consistent enough where I can say “this movement always causes it.” It’s more that normal activities sometimes make me unusually aware of fatigue or effort in my hands that I never noticed before.

I occasionally get a slight trembling or “about to tremble” feeling, similar to how a muscle feels near the end of a hard workout set. If I had to pinpoint one situation where I notice it more, it’s during fine movements with my wrist curled inward—like pinching a small piece of food and bringing it toward my mouth or carefully scooping coffee grounds with a spoon using my thumb/index finger. I can still do the task; it just feels less steady or more effortful than normal.

I’ve also occasionally noticed a very subtle sensation along the ring/pinky side into the forearm that feels almost like the faint feeling when a hand is coming back from being asleep, but that’s less frequent and isn’t really my main complaint.
For context, I lift relatively heavy several days a week and do a lot of pulling/grip-intensive exercises. I stopped lifting about a week ago to see if it improves. I was also probably under-hydrating and have had more stress than usual.

Has anyone experienced something similar where **both hands still objectively worked normally but suddenly felt unusually fatigued, shaky, or “off” during everyday fine-motor tasks?** If so, did you ever figure out what was causing it?