What it is
Cramping refers to sudden, involuntary, painful muscle contractions or visceral spasms.
Emerging evidence
Cramping
Sudden, involuntary, painful contractions affecting muscles or internal organs, with cause varying by location and context.
CategoryPain
Reviewed by Internal Medical Editorial Team · Editorial Health Review
26 March 2026
At a glance
Cramping at a glance
Commonly experienced as
- The experience of cramping varies by location and type: calf cramps are often nocturnal and wake people suddenly from sleep; menstrual cramps can be incapacitating for days; gut cramps produce unpredictable, urgent episodes. All share the characteristic of sudden onset and the temporarily out-of-control quality of the affected muscle.
Evidence context
Emerging evidence
