Common in later life, but not just ageEmerging evidence
In one UK study of 5,109 people aged 50 and over in North Staffordshire, 11.7% had ankle pain in the past month: 14.1% of women and 9.2% of men. In that study it was no more common in older age groups (12.2% at 50 to 64, 11.2% at 65 to 74 and 11.1% at 75 and over), though the age groups' ranges overlapped and fewer women over 75 took part. Across population studies, about 15% of people aged 45 and over had frequent ankle pain.
Sources 1, 2
Ankle arthritis: less common than people think, and usually after an old injuryStrong evidence
Only 3.4% of people over 50 had painful ankle arthritis on X-ray in the UK study, against 16.7% for the foot and 12.0% for the knee. In specialist centres, 70% to 78% of severe ankle arthritis followed an injury, most often an old ankle fracture. "Joint injuries can also make you more likely to get osteoarthritis, and this is particularly the case with ankle injuries", Arthritis UK says.
The National Institute for Health and Care Excellence (NICE) diagnoses osteoarthritis without an X-ray from 45 when the pain comes with activity and morning stiffness lasts 30 minutes or less. Longer stiffness, or several swollen joints, points to an inflammatory arthritis, which needs a GP.
Sources 1, 3, 4, 5, 6
The tendon along the inner ankle: common, and often missedEmerging evidence
Tibialis posterior tendon problems affected 3.3% of women over 40 at one English practice, and none had been diagnosed. A review lists flat feet, high blood pressure, diabetes and a steroid injection near the tendon as risks, and an NHS Lothian leaflet adds past ankle injuries, a sudden rise in activity, less supportive footwear and a higher body weight. Most people are first told they have a sprain or arthritis.
The signs are pain and swelling behind and below the inner ankle bone, worse with walking and by evening, the arch flattening, and being unable to rise onto tiptoe on that foot. The NHS asks you to see a GP for flat feet that are new, painful or on one side only.
Sources 7, 8, 9, 10
Swollen ankles: often harmless, but the pattern mattersStrong evidence
"Swelling in the ankles, feet or legs often goes away on its own", the NHS says. The usual causes are sitting or standing still for long, salty food, weight, some medicines (blood pressure tablets, steroids, antidepressants, hormone treatments), varicose veins and thyroid problems; less often the kidneys, liver or heart, a clot or an infection. One US review calls weak leg veins the commonest cause in older adults.
Amlodipine and similar blood pressure tablets caused ankle swelling in 10.7% of people across 106 trials (12.3% with the amlodipine group), against 3.2% on placebo or other tablets, more often at higher doses. Lymphoedema is less common: soft swelling that may come and go and get worse during the day.
Sources 11, 12, 13, 14, 15, 16
Heart failure and clots: the swelling that needs helpStrong evidence
Heart failure causes swollen ankles with breathlessness on everyday activity or lying down, tiredness and sudden weight gain. About 1 million people in the UK have it, and the average age at diagnosis is 76. The NHS stresses that it "does not mean your heart has stopped working", and treatment "can help manage symptoms and keep heart failure stable for many years".
A clot in a leg vein (deep vein thrombosis, DVT) usually causes throbbing pain and swelling in one leg, with red or darker skin. Being over 60, heart failure, varicose veins, surgery or a hospital stay, a long journey and time in a cast make it more likely.
Sources 17, 18, 19, 11
Twists and falls: breaks are more common in later lifeEmerging evidence
In Denmark, broken ankles were more common in women (203 against 154 per 100,000 a year), and rising most in women over 50. In one Turkish emergency department study of 160 people aged 65 and over with an ankle injury, 37.5% had a break, against about 10% to 12% of adults in the original Canadian studies, so a twist in later life deserves a check.
Clinicians use the Ottawa ankle rules to decide who needs an X-ray: tenderness at the back edge or tip of either ankle bone, or being unable to take four steps. Across 27 studies they missed almost no breaks, they worked in that study of people aged 65 and over (98% of breaks picked up), and NICE uses them for everyone over 5. Whether ankle fractures in later life are linked with thin bones is mixed: one study found higher weight, not osteoporosis, raised the odds.
Sources 20, 21, 22, 23, 24, 25, 26, 27
Gout, pseudogout and infectionStrong evidence
Gout is still more common in older men than women, but the gap narrows with age (2.5 times at over 90), and water tablets, kidney problems and the menopause raise the risk. NICE names the ankle among the joints it can affect. Calcium pyrophosphate crystal arthritis (once called pseudogout) is linked with ageing and osteoarthritis, and fluid from the joint confirms it. A joint infection is less common but urgent; a high temperature is usual, "although not everyone has one", the NHS says.
Sources 28, 29, 30, 31, 32
Circulation and diabetesStrong evidence
About 20% of people over 60 have some narrowing of the leg arteries (peripheral arterial disease), often without symptoms; smoking is the biggest risk. The ache usually comes in the calf, thigh or buttock on walking, and eases with rest. "Many people mistakenly think this is just part of growing older", the NHS says.
With diabetes, NICE asks clinicians to suspect a Charcot foot with redness, warmth or swelling "even when deformity is not present or pain is not reported", and warns that a broken foot or ankle can progress to it.
Sources 33, 34, 35, 36
When a scan or test helpsStrong evidence
Ankle arthritis needs no routine X-ray, NICE says. An X-ray matters after a twist or fall when the Ottawa points apply, and before surgery. The tibialis posterior tendon is diagnosed by examination ("Scans are not usually needed").
Swelling in one leg needs an ultrasound scan within 24 hours if a clot is suspected; breathlessness with swollen ankles needs a blood test (NT-proBNP) and, if it is raised, a heart scan (echocardiogram); leg ache on walking needs the ankle-brachial pressure index; a hot, swollen joint may need a urate test and fluid from the joint; and a suspected Charcot foot needs a weight-bearing X-ray, then magnetic resonance imaging (MRI) if that is normal.
Sources 6, 23, 25, 9, 19, 37, 38, 39, 30, 36
How it usually goesEmerging evidence
"In many cases, new pain or a flare-up of long-standing ankle problems should begin to settle within 6 weeks", NHS inform says. With ankle arthritis, "your symptoms probably won't get worse, and they may even improve", Arthritis UK says, though no study has put numbers on it. The tibialis posterior tendon is easier to treat early. A broken ankle "usually takes 6 to 8 weeks to heal, but it can take longer", and an untreated gout attack "usually lasts 1 to 2 weeks". No one can promise a timescale.
Sources 40, 5, 9, 41, 29, 17