What should you know about full body muscle cramps?

A cramp is a sudden, involuntary tightening that can make a muscle feel hard and painful. Cramps after heat, sweating, vomiting, diarrhoea or unusual activity may reflect fluid and mineral loss or strain. Recurrent widespread cramps can also occur with thyroid disease, kidney disease, reduced muscle mass, circulation problems or vitamin D deficiency. The pattern matters: note which muscles are affected, how long each episode lasts, and whether weakness, numbness or swelling occurs with it.

Stop the activity, gently stretch the affected muscle and use light massage or warmth. Sip fluids if you may be dehydrated, unless a clinician has told you to restrict fluids. Avoid taking electrolyte products or supplements routinely without advice, particularly if you have kidney disease or take regular medicines. Keep a record of triggers, timing and associated symptoms for your appointment.

Arrange medical review when cramps are new, frequent, widespread, worsening or disturbing sleep, or when they occur with weakness, numbness, swelling or changes in walking. Seek urgent care for severe pain that does not ease, dark urine after major exertion, sudden one-sided weakness, chest pain or trouble breathing.

Ask whether your medicines, hydration, thyroid, kidney function, circulation or vitamin levels could contribute, and which tests or changes are appropriate.