Medically reviewed by Oluseun Olufade, MD Possible causes of leg cramps (charley horses) are too much or too little exercise, dehydration, low electrolyte levels, and certain conditions. Treatments ...

Leg cramps typically cause a sudden severe pain in the affected muscle. You might also feel a hard "knot" or twitching of the muscle under the skin. The calf muscles are the most common site for ...