For a long time I’ve experienced this, and it’s always when I’m tired (usually it occurs when lying in bed about to go to sleep). I’ll feel somewhere in my body a muscle twitch involuntarily. It’s usually in the lower body (ankle, leg, thigh) but once in a while I’ve felt it in the upper body.
This used to happen pretty rarely (like maybe once a week if that), but lately I’ve noticed it happening more often (pretty much every day). I have a doctor’s appointment in about a month during which I definitely plan to ask about it, but I’m just curious whether this could be a sign of something troublesome that I might need to deal with sooner, or if it’s normal. For the record, I have no other symptoms that I can tell and feel otherwise healthy.
Never a bad idea to go to the doctor, unless of course you are me. Muscle spasms can have causes that are impossible to diagnose. It could be a mineral deficiency or an absorption difficulty. You may require something more than the norm so a standard diagnosis can miss something. The doctor will run appropriate tests and you will feel better that the sky is not falling.
If it’s while falling asleep, it’s a myoclonic jerk. The twitching of a muscle that occurs intermiitently throughout the day is called a benign fasciculation.
Yeah, it happens sometimes. It hasn’t happened to me in a while, thankfully. It can be really unnerving because it jerks you out of a nice sleepy drift, but not uncommon or dangerous.
I started a thread about this a couple of years ago. For me, this started soon after i started exercising regularly again after a considerable hiatus. It still happens to me occasionally, but not as much as it did for the first year after i started exercising.
As i noted in that thread, the main dangers that we found resulting from this phenomenon were:
me clocking my wife in the head with a twitching arm while we were in bed, and
me striking my arm on the edge of our coffee table when i twitched during an afternoon nap on the couch.