Cramps are involuntary painful muscular contractions - typically triggered by dehydration and an imbalance in electrolytes - particularly sodium, potassium, calcium and don't forget magnesium.  The onset of cramping is abrupt and generally subsides within a minute or so, but can last for an hour or more.

THC has been shown to stop cramps, in both men and women. Cannabis reduces inflammation and alleviates pain through its direct interaction with the receptors in the brain resulting in bringing down swelling and relieves pain.

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