What usually causes itEmerging evidence
Foot pain at night has a handful of common causes. Nerve damage (peripheral neuropathy) affects almost 1 in 10 people aged 55 and over, the NHS says, and brings burning, sharp or stabbing pain, tingling and numbness, usually in both feet; diabetes is the commonest cause. Gout attacks often start overnight. Cramps mostly come at night or at rest and can affect the feet, and restless legs are usually worse in the evening and at night.
Plantar fasciitis, the commonest cause of heel pain, is different: the NHS says it's worse when you start walking and better when resting, and the American Academy of Orthopaedic Surgeons (AAOS) says it's worst on the first steps in the morning. Pain that wakes you points elsewhere.
Sources 1, 2, 3, 4, 5, 6, 7
Nerve pain and diabetesEmerging evidence
The NHS says up to 1 in 4 people with diabetes have some pain from nerve damage. In a community study of 15,692 people with diabetes in north-west England, 34% had painful nerve symptoms on a questionnaire and 21% had painful neuropathy on examination as well; painful symptoms were twice as likely with type 2 diabetes as type 1, and 50% more likely in women. Even a light touch can hurt, NHS inform says. Other causes include alcohol, low vitamin B12, an underactive thyroid, chemotherapy, kidney or liver disease and some medicines.
Sources 8, 9, 2
Why pain can be worse at night: what's known and what isn'tEmerging evidence
Diabetes UK says nerve pain may be worse at night, perhaps from cooler evenings, stress at the end of the day and fewer distractions. Drug trial data back the pattern: pain rose through the day in diabetic nerve pain and after shingles, by about a third between 8am and 8pm, and all 8 human studies in a review found nerve pain peaking late in the evening and early in the night. No study we found measured foot pain in bed itself.
Other causes have their own rhythms. Gout attacks were 2.36 times as likely between midnight and 8am as in the daytime, in 724 people followed for a year. Rest pain from badly narrowed arteries is worse lying down and eased by hanging the foot down, guidelines say. Erythromelalgia flares with warmth, and the NHS lists warm clothes, shoes and temperatures among its triggers; a warm bed being one is our inference.
In a laboratory study of healthy volunteers kept awake under controlled conditions, pain sensitivity peaked in the middle of the night, and in studies that follow people over time, poor sleep predicted worse pain more strongly than pain predicted poor sleep. Neither was in people with foot pain, so applying them here is our inference.
Sources 10, 11, 12, 13, 3, 14, 15, 16, 17, 18
Circulation: rest pain is a warning signStrong evidence
When the arteries in the leg are badly narrowed (chronic limb-threatening ischaemia), a constant burning pain in the toes and forefoot can come on at rest, often waking you at night, and is eased by hanging the foot down or getting out of bed. Guidelines want it present for 2 weeks or more, with tests showing poor blood flow, and say everyone with suspected rest pain should be referred urgently to a vascular specialist; the NHS says contact a GP immediately. It develops in 1 to 2 in every 100 people with peripheral arterial disease a year, and in 5% to 10% of people with calf pain on walking (claudication).
Claudication itself is calf pain on walking that eases with rest, not a night pain: 75% of people with it stay the same or improve, and the National Institute for Health and Care Excellence (NICE) recommends supervised exercise. A foot that is suddenly cold, pale and very painful is different again: a vascular emergency that needs immediate care.
Sources 14, 15, 19, 20, 21
Gout, cramps and restless legsStrong evidence
Gout causes sudden, severe pain with heat, redness and swelling, usually in the big toe joint, sometimes in the midfoot or ankle; NICE describes its rapid onset, often overnight; the NHS describes sudden or severe pain when anything touches the foot, and Arthritis UK says even the weight of a bedsheet can be unbearable. An untreated attack lasts about 1 to 2 weeks, the NHS says, or usually 5 to 7 days, Arthritis UK says.
Night cramps affect up to 60% of adults, a review says: most often the calf, less often the feet, lasting seconds to 10 minutes. Restless legs bring an urge to move the legs with unpleasant feelings, worse at rest in the evening and at night and eased by moving: in a survey of 15,391 adults, 7.2% reported symptoms and 2.7% had them often and badly enough to need treatment.
Sources 3, 22, 23, 24, 57, 4, 25, 5, 26, 27
Nerves at the ankle and the ball of the footEmerging evidence
Tarsal tunnel syndrome, a squeezed nerve behind the inner ankle bone, causes burning and tingling into the sole and toes. One single-author review says it's typically worse at night and with activity, and another says night symptoms can disturb sleep. Morton's neuroma causes burning or sharp pain between the third and fourth toes, mostly when you walk in tight or high-heeled shoes; the AAOS says night pain is rare.
Sources 28, 29, 30, 31, 58
Rarer causesEmerging evidence
Erythromelalgia is rare: burning pain, redness and heat, mainly in the feet (88% of 168 people in one series), usually in flares; over about 9 years, a third got worse, a third improved and 1 in 10 recovered fully. Chilblains are itchy, burning, red or purple toes a few hours after the cold.
A stress fracture starts as pain in one spot with activity and can become a constant dull ache, even at night, Health New Zealand says. Bone pain that's worse at night, especially with a lump or weight loss, needs a GP. Complex regional pain syndrome (CRPS) can follow an injury, with skin so sensitive that a light touch or a change in temperature hurts.
Sources 16, 32, 33, 34, 35, 36
Pregnancy and childrenStrong evidence
In pregnancy, night cramps are common later on, restless legs affect about 1 in 5 women, and feet swell by the end of the day. The NHS says restless legs in pregnancy usually go away after the birth, while RLS-UK says symptoms often continue. Sudden swelling of the face, hands or feet, with a bad headache, vision problems or pain below the ribs, can be pre-eclampsia and needs urgent help.
Growing pains affect both legs, in the evening or at night, in children aged 3 to 12, and are gone by morning, the NHS says; pain in one leg, a limp or a swollen joint needs a GP. RLS-UK says restless legs in children are often mistaken for growing pains.
Sources 4, 27, 5, 37, 38, 39
TestsEmerging evidence
A GP may arrange blood tests to find the cause of neuropathy, and NICE asks for the feet of people with diabetes to be checked at least once a year. Narrowed arteries are checked by comparing the blood pressure at the ankle and the arm (the ankle-brachial pressure index), and in diabetes toe pressures are preferred. Gout is confirmed with a urate blood test, repeated at least 2 weeks after a flare if it's normal during one, with fluid from the joint if infection is possible. An X-ray or other scan checks for a stress fracture or a Charcot foot, a GP can check iron levels for restless legs, and nerve tests help with tarsal tunnel syndrome.
Sources 1, 2, 40, 20, 14, 22, 34, 5, 28
How it usually goesEmerging evidence
Neuropathy may improve if its cause can be treated: well-controlled diabetes may stop it getting worse, NHS inform says, though some damage is permanent. An untreated gout attack settles within about 1 to 2 weeks, and urate-lowering treatment is offered if attacks keep coming. Most people with calf pain on walking stay the same or improve. Restless legs in pregnancy usually go after the birth, the NHS says, though not always. Stretching before bed reduced night cramps in a trial. No one can promise a timescale.
Sources 2, 24, 22, 15, 5, 27, 43