How do you treat a muscle spasm?

The treatment of muscle spasm includes rest balanced with gentle stretching, heat or cold, massage, and, in some cases, a pain reliever or muscle relaxant medication. Muscle cramps and spasm may be due to dehydration and electrolyte imbalance (for example, after exercising in a hot environment) so rehydration and replacement of electrolytes can be effective. For persistent or severe muscle spasms, prompt medical evaluation is appropriate.