Twitches are common, usually caused by stress, tiredness, caffeine, or alcohol, and very rarely serious.
The NHS lists those triggers, notes eyes and legs are the usual spots, and says most twitches stop on their own in days or weeks. Sleep, less caffeine and alcohol, and not obsessing over the twitch are the treatment. The see-a-GP line is clear: a twitch lasting more than 2 weeks, twitching in more than one place, or the area feeling weak or stiff. Some medicines list twitching as a side effect, but do not stop a prescribed medicine without medical advice.
What to do
Common questions
Why do I get muscle twitches?
Almost always benign and lifestyle-linked. The NHS says twitches are common and very rarely a sign of anything serious, and they are often linked to stress and anxiety, tiredness and exhaustion, drinking caffeine or alcohol, and some medicines. Eyes and legs are the most common spots. They come and go over days to weeks and usually stop on their own. The practical fixes match the causes: sleep properly, ease off the coffee and alcohol, and do not worry about the twitch, because worrying feeds it, per the NHS. Check any new medicines' leaflets for twitching as a side effect. See a GP if a twitch lasts more than 2 weeks, appears in more than one place at once, or the muscle feels weak or stiff, since those patterns deserve a proper look, and possibly a neurologist referral. Do not stop a prescribed medicine because you suspect it, though: the NHS is explicit that you should get medical advice first. One honest caveat people need: if weakness, wasting, or trouble speaking or swallowing ever joins the twitches, that is a prompt-assessment pattern, not a watch-and-wait one.