UGH Why do I have muscle jerks?

Im a 26 year old female otherwise healthy but for as long as I can remember I have had random muscle jerks when Im just sitting down relaxing or laying down. Where my muscle will just spasm or something and send that arm, leg, hand, whatever jerking for a split second. Its so annoying and I dont know why this... show more Im a 26 year old female otherwise healthy but for as long as I can remember I have had random muscle jerks when Im just sitting down relaxing or laying down. Where my muscle will just spasm or something and send that arm, leg, hand, whatever jerking for a split second. Its so annoying and I dont know why this happens to me. My grandpa had the same thing so maybe its genetics? Theres gotta be a reason for it.

Its embarrassing when Im on a date with a guy and we're chillin on the couch watchin netflix and my dam shoulder jerks and hes like yo, you ok? lol

Only medication Im on is birth control pills. I do drink alcohol on the weekends, I live a modern lifestyle, skinny...
Update: Cant say for certain how often it happens, Id guess 5 times a week, give or take.
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