Causes of Calf Pain and Treatment Options - Verywell Health
https://www.verywellhealth.com/causes-of-calf-pain-and-treatment-options-2549387
WebJun 9, 2023 · A calf muscle cramp is a sudden, involuntary contraction of one or more calf muscles. These are often referred to as "Charley horses." Calf cramps can be intensely tight and painful, and may even cause a visible knot or a twitching sensation. Afterward, your calf muscle may be sore for a few days.
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