When the weather is cold, the old man's calf cramps. What happened?

Leg blood drawing often occurs after local cold stimulation, such as not keeping the calf warm when sleeping or not getting ready for swimming.

Guiding opinions:

Usually when the calf cramps, the faster the treatment, the better the effect. For example, immediately straighten the knee of the calf and push the ground at the same time, or pull the big toe in the instep direction for a while.

It is best to use hot compress after remission, which will help to improve.

If it still hurts the next day, you can massage hot compress, soak in warm water, or use safflower oil externally.

Some people think it is related to calcium deficiency, so taking some calcium D may help.