Muscle cramps — sudden, involuntary and painful muscle contractions — are extremely common and usually benign, though they can be severely disruptive to sleep and daily functioning when frequent. Causes range from dehydration and electrolyte imbalance to medication effects, neurological conditions and overuse. Most cramps respond well to lifestyle measures and physiotherapy, though persistent or severe presentations warrant medical assessment.
See therapies that may helpMuscle cramps are sudden, involuntary contractions of a muscle or group of muscles, typically lasting seconds to several minutes and producing intense, localised pain. They most commonly affect the calf, foot and thigh muscles, and are particularly common at night (nocturnal leg cramps).
Common causes include: dehydration and electrolyte imbalances (sodium, potassium, magnesium, calcium); overuse or sustained muscle contraction; medication side effects (statins, diuretics, certain antihypertensives); poor circulation; nerve compression; pregnancy; and neurological conditions. Nocturnal leg cramps become more prevalent with age and are reported by up to 33% of adults over 60.
Muscle cramps may present as:
Cramps associated with significant weakness, numbness, swelling or that are very frequent and severe warrant medical assessment.
Management of muscle cramps:
A GP is the appropriate first contact for frequent or severe muscle cramps to exclude medical causes and review medications. A physiotherapist can assess and address biomechanical and exercise-related contributors. A sports therapist or massage therapist can address the soft tissue component.
Showing 8 therapies linked to Muscle cramps.
| Therapy | Evidence | Notes |
|---|---|---|
| Nutritional Therapist |
strong
|
Reviewing dietary intake of magnesium, potassium, calcium and fluids can address nutritional shortfalls that often trigger muscle cramps. |
| Fascial Stretch Therapist |
moderate
|
Assisted stretching of the affected muscles and surrounding fascia improves flexibility and can lower the tendency of muscles to cramp. |
| Hydrotherapist |
moderate
|
Warm-water exercise and contrast bathing relax cramp-prone muscles, ease residual soreness and support gentle movement without strain. |
| Massage Therapist |
moderate
|
Hands-on massage can ease the tightness and tenderness left in muscles after cramping and may help reduce how often spasms recur. |
| Myofascial Release Practitioner |
moderate
|
Releasing tight fascia and trigger points in overworked muscles can settle the knotting and tension that contribute to cramping. |
| Physiotherapist |
moderate
|
A physiotherapist can pinpoint muscle imbalances or overuse behind your cramps and prescribe stretching and strengthening to reduce them. |
| Pilates Practitioner |
moderate
|
Pilates builds balanced muscle strength, control and flexibility, helping prevent the overload and fatigue that often provoke cramps. |
| Sports Therapist |
moderate
|
Sports therapy targets the overuse, poor warm-up and muscle fatigue behind exercise-related cramps with tailored stretching and recovery work. |
Nocturnal leg cramps are common, particularly in older adults, and are often idiopathic (without clear cause). Contributing factors include dehydration, electrolyte imbalance, prolonged sitting or abnormal leg positions, medication effects (diuretics, statins), and age-related changes in muscle and nerve function. They become more common with age.
Regular stretching, particularly calf and foot stretches before bed, reduces nocturnal leg cramp frequency in many people. Stretching during a cramp — pulling the foot towards you — helps terminate it by triggering the inverse myotatic reflex. Evidence for pre-exercise stretching preventing exercise cramps is less clear.
Yes — dehydration and the associated electrolyte disturbances (low sodium, potassium, magnesium) are well-established contributors to muscle cramping, particularly during exercise or in hot conditions. Ensuring adequate hydration and electrolyte intake before and during exercise reduces cramping risk.
Yes — muscle symptoms including cramps, aches and weakness are among the most common side effects of statins. They affect around 5–10% of people taking statins. If you think statins may be contributing to cramps, discuss this with your GP — alternative statins, dose adjustments or other management strategies may help.
Evidence is mixed. Magnesium supplementation has the clearest evidence for pregnancy-associated leg cramps. For other types, evidence is less consistent, though magnesium deficiency is a known contributor to cramping. Dietary sources (nuts, seeds, leafy greens, legumes) are preferable to supplementation where possible.