i got neck cramp from cracking my neck a lot. i crack the left side of my neck much more and harder than the right side but so far i haven't got neck cramp on the left side yet but only the right side though.
about 12 1/2 years ago, i got acupuncture on both sides of my neck and shoulders and left temple of my head. the acupuncturist use needles that had some kind of drug in it that make both sides of my neck and shoulders stiff. i went to get acupuncture for like once a day for 2 to 4 weeks straight and i stopped going. like a month later, the drug that he used made me feel like cracking my neck a lot. i didn't realize that was the case until about a year later.
several days ago like 5 days or so ago, i think i sprained the lower right side of my neck where my right shoulder is from cracking my neck. again, strange thing is i crack the right side of my neck less harder and less frequent than the left side but i sprained the right side while the left side is doing okay so far.
the last time i got a neck cramp before this one was probably several years ago. maybe 4 or 5 years ago. might be sooner than that. i don't remember that well. if i remember correctly it probably take as soon as 2 weeks for it to go away. so going from experience, i have like 9 more days to go as the soonest to see if it go away completely.