The first method is: once a leg cramp occurs, you can immediately grasp the big toe on the cramp side with your hand, and then slowly pull the sole of your foot in your own direction to stretch the gastrocnemius muscle. Straighten your feet slowly, and then stretch your legs hard so that the calf muscles will not cramp; Or massage the calf with both hands, it can also be effective.

The second method is: lean forward against the wall and touch the ground with your heel. It's also helpful to just stand and then focus on the cramped leg, but you should be careful to fall: it would be better if someone could help you. Heating (using electric blanket or warm water but not boiling water) or massaging your legs and feet can also help to relax your muscles, but it is best to try to stretch them first.