A member asked:

What causes a painful muscle spasm in the calf muscle?

A doctor has provided 1 answer

A charlie horse.....: Large muscles use a lot of energy to do work, and this is supplied by blood. If the supply is not adequate their can be painful spasm; and if metabolites from heavy activity are not removed there can be spasm. Other causes can be a trapped nerve root irritating the muscle. Some people have greater likelihood of spasm due to underlying genetic causes.

Answered 4/16/2020

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