third trimester leg cramps & Charlie horses

L
31 weeks and I've been waking up with leg cramps and miserable Charlie horses in both calves for weeks. So bad to the point I can hardly walk the next day. 
Fast forward to ordering Mortons epsome salt lotion. Using it one night I had results. No cramps or knots since and the soreness is slowing going away!! Best $5 I've spent this pregnancy!