Cramp or clot?
A cramp comes on suddenly and passes. A clot brings throbbing pain and swelling in one leg that does not pass, often with red, blue or darkened skin or swollen veins. Swelling with a cramp needs a GP check.
Pain guide · Leg pain
Leg cramps at night: stretches that may help, honestly
A leg cramp is a sudden, painful tightening of a muscle, usually in the calf or foot, often at night. The NHS says regular calf stretching may help to reduce cramps but may not stop them completely.
The evidence is thin, so this guide says plainly what it rests on: mostly one trial of nightly calf and hamstring stretching in adults over 55.
When to get help first
Exercise is for pain that has been checked or is clearly mild and settling.
Get urgent medical help if
- Call 999: calf or leg pain or swelling with breathlessness or chest pain. It could be a clot that has reached the lungs. Do not drive yourself to A&E.
- Go to A&E: sudden swelling, redness, heat and pain in the calf; severe pain after an injury, which can mean a broken bone; or you cannot put any weight on the leg.
- Same day (GP or NHS 111): throbbing pain and swelling in one leg, usually the calf or thigh, with red, blue or darkened skin or swollen veins. This can be a deep vein thrombosis (DVT). It is more likely after surgery, a hospital stay, 3 or more days in bed, a journey of over 4 hours, pregnancy or a recent birth, cancer, a previous clot, or oestrogen-containing contraception or HRT.
- Call 999 or go to A&E: a leg that is suddenly cold, pale, numb, weak or very painful. A sudden loss of blood supply to a leg is a vascular emergency.
See a doctor or physiotherapist if
- Cramps that disturb your sleep.
- Cramps that last longer than 10 minutes.
- Cramps with numbness or swelling in the leg.
- Calf pain that comes on when you walk and goes after a few minutes' rest: this is not cramp, and it needs a GP check (claudication).
Understand it
Quinine, pregnancy and medicines
Quinine is a GP decision and not suitable for everyone. If cramps are frequent, or you are pregnant, ask your GP or midwife before trying anything beyond stretching.
Source 1
What helps, and how strong the evidence is
During a cramp: stretch, rub, standMixed evidence
The NHS advises stretching and massaging the muscle, and says standing up and putting weight on the leg may help. No trials of in-the-moment relief were found.
Source 1
Nightly calf and hamstring stretching may ease how bad they areMixed evidence
A 2021 Cochrane review found that daily calf and hamstring stretching for 6 weeks may reduce the severity of night cramps in people aged 55 and over, but the effect on how often they happen is uncertain (very low-certainty evidence).
Source 2
The one trial behind itEmerging evidence
In 80 adults over 55 who were not taking quinine, calf and hamstring stretches just before sleep for 6 weeks reduced cramps by about 1.2 a night, and their severity by 1.3 cm on a 10 cm scale.
Source 3
Calf stretching alone made little differenceMixed evidence
In people aged 60 and over, calf stretching on its own for 12 weeks made little or no difference to how often cramps happened. The routine that helped stretched the hamstrings too.
Source 2
How much pain is OK while you exercise?
A mild stretch, never a painful one
For the bedtime routine, this site suggests stretching to a mild, steady pull and holding it without bouncing. During a cramp, ease into the stretch gradually; the cramp may hurt, the stretch should not add to it.
Source 1
The exercise plan: 2 stages
Start at the first stage. Each move opens a full guide with a 3D demo.
Stage 1
When a cramp strikes
Stretch and massage the cramping muscle, or stand up and put your weight on the leg.
3D demoWall calf stretch (gastrocnemius)Beginner · A wallHold until the cramp eases
Easier: Seated calf stretch with a towel · Harder: Peroneals Stretch
3D demoSeated calf stretch with a towelBeginner · Other / check instructionsHold until the cramp eases · In bed: pull the toes toward you with a towel or your hand
Move on when: The cramp has passed. If cramps keep coming back, start the bedtime routine.
Follow along: a timer, a cue and the next move, one step at a time.
Stage 2
Every night: a short bedtime routine
Just before bed, every night, for at least 6 weeks, the length of the trial. The holds are this site's suggestion.
3D demoWall calf stretch (gastrocnemius)Beginner · A wall3 holds of 20 to 30 s each side
Easier: Seated calf stretch with a towel · Harder: Peroneals Stretch
3D demoSoleus wall stretchBeginner · A wall3 holds of 20 to 30 s each side
Easier: Seated calf stretch with a towel · Harder: Peroneals Stretch
3D demoSupine hamstring stretch with a strapBeginner · No equipment3 holds of 20 to 30 s each side
Easier: Leg-up hamstring stretch · Harder: Contract-relax hamstring stretch (PNF)
3D demoSeated calf stretch with a towelBeginner · Other / check instructions3 holds of 20 to 30 s each side · In place of the wall stretches if standing is hard
Move on when: After 6 weeks, take stock: keep going if cramps are fewer or milder. If not, or they disturb your sleep, see your GP.
Follow along: a timer, a cue and the next move, one step at a time.
Routines to follow
More moves for this area
Questions people ask
What stops a leg cramp fast?
Stretch the muscle: for the calf, pull your toes up toward you or stand and lean into a wall calf stretch, and massage it. Standing and putting weight on the leg may help.
Do stretches prevent night leg cramps?
They may make them milder. In one trial of adults over 55, calf and hamstring stretches before bed for 6 weeks reduced cramps a little; calf stretching alone did not help in another. Expect fewer or milder cramps, not none.
When should I see a GP about leg cramps?
If they disturb your sleep, last longer than 10 minutes, or come with numbness or swelling.
Is it a leg cramp or a blood clot?
A cramp passes; a clot causes throbbing pain and swelling in one leg that does not pass, often with red or darker skin. One swollen, painful calf needs a same-day check, and with breathlessness or chest pain, call 999.
Can I take quinine for leg cramps?
Only if a GP prescribes it; it is not suitable for everyone.
Other pain guides
Sources
- NHS · Leg cramps
- Hawke 2021 · Non-drug therapies for preventing lower limb muscle cramps (Cochrane review)
- Hallegraeff 2012 · Stretching before sleep and night leg cramps in older adults (RCT, J Physiother)
- NHS · Deep vein thrombosis (DVT)
- NHS · Peripheral arterial disease (PAD)
- Leicestershire Partnership NHS Trust · Leg pain (thigh and calf): physiotherapy leaflet (2026)
- NHS Scotland Right Decision Service · Intermittent claudication: vascular surgery pathway
Exercise education, not a diagnosis or treatment plan. It is written from the guidelines and studies listed above; review by a clinician is pending. If your pain follows an injury, is severe, is getting worse, or comes with any warning sign listed on this page, get it assessed. Health disclaimer.