Ankle Supports for Weak or Swollen Ankles

Why ankles become weak or swollen

Weak or unstable ankles. - Previous sprains that left stretched ligaments. - Weak muscles of the lower leg and foot, from lack of use or ageing. - Arthritis in the ankle or foot. - Peripheral neuropathy, such as from diabetes, which reduces the sense of foot position; see neuropathy and balance and neuropathy foot care. - Stroke or nerve injury, causing foot drop or weakness. - Poor footwear. - Balance problems and falls; see balance exercises for seniors.

Swollen ankles. - Fluid retention from prolonged sitting or standing, heat and humidity. - Venous insufficiency (weak vein valves) and varicose veins. - Heart failure, kidney disease or liver disease. - Medicines, such as some blood pressure tablets and anti-inflammatories. - Lymphoedema. - Injury or infection, such as cellulitis. - Deep vein thrombosis (a blood clot), which usually affects one leg.

The cause of swelling matters more than the support. See swollen legs in older adults.

Types of ankle support

Elastic sleeve (tubular support). A pull-on stretchy sleeve around the ankle, with mild compression and warmth. Useful for mild aches or after minor strain. May slip and does not limit movement much.

Compression sock or stocking. A longer garment, with graded compression, used for swelling and vein problems; see compression stockings guide. These need correct measuring and a check of leg circulation.

Figure-of-eight wrap or strap. A strap that winds around the ankle and foot in a figure of eight, giving a firmer hold. Adjustable, popular for sprains.

Lace-up ankle brace. A fabric brace with laces at the front and sometimes straps, giving good support for moderate instability, and adjustable for swelling. Fits inside a shoe.

Stirrup brace. Semi-rigid plastic or gel shells on each side of the ankle, held by straps, which limit side-to-side movement while allowing up-and-down motion. Used for acute sprains and instability.

Hinged ankle brace. A more rigid brace with hinges at the ankle, for greater stability or after injury.

Walker boot or cast boot. A rigid boot, used after fractures or severe sprains, prescribed by a doctor; see supports and braces after a fracture.

Ankle-foot orthosis (AFO). A custom or semi-custom plastic brace that supports the ankle and foot, used for foot drop, for instance after stroke. Prescribed and fitted by an orthotist or therapist.

Gel pads and heel supports. Cushions to reduce pressure; see insoles for foot pain and heel pain and plantar fasciitis.

Who might benefit

• A person with a mild sprain or strain, for a few days to weeks, with a doctor's advice.
• A person with chronic mild instability, who feels the ankle roll or give way, when supported by exercises.
• A person with arthritis, for warmth and comfort in the ankle.
• People who feel more confident with a bit of support during walks.
• Those recovering from a fracture or surgery, with the type prescribed by the treating team.
• Some people with foot drop, with an AFO.

When to be careful or avoid

• Swollen legs with unknown cause. Do not use compression supports until a doctor has checked the circulation and the cause of swelling.
• Peripheral arterial disease or poor circulation, such as cold, pale or painful feet, absent pulses, or leg ulcers. Compression can reduce blood flow. A doctor may check the pulses or measure blood pressure in the leg.
• Heart failure, where compression may shift fluid and strain the heart, in some cases. Ask the doctor.
• Numb feet, such as in diabetes, where a tight or rubbing support may cause blisters or ulcers without being felt; see diabetic foot care at home.
• Skin problems, wounds, ulcers, rashes, cellulitis or fragile skin.
• Suspected fracture, after a fall or twist with pain, swelling and difficulty bearing weight; get an X-ray rather than strapping it up.
• A hot, red, swollen, painful calf, which could be a clot; see a doctor urgently.
• Allergy to latex or elastic.

Choosing and fitting

1. Know the purpose. Warmth, mild support, firm stability, swelling control, or protection after injury? 2. Measure. Many ankle supports are sized by the circumference around the ankle at the narrowest part, or around the ankle and heel, plus shoe size. Use the maker's chart, with a soft tape. Measure at the end of the day when swelling is greatest, and again after rest if swelling varies. 3. Choose a fit that works with shoes. A bulky brace needs a roomier shoe. Choose lace-up or slip-on shoes that accommodate it; see choosing shoes for older feet. 4. Check the position. The heel should be centred, and the straps should not twist. The support should sit at the ankle bone level, as specified. 5. Snug but comfortable. There should be no pain, numbness, tingling or colour change in the toes. You should be able to slip a finger under the edge. 6. Check movement. Walk and climb a step. The brace should hold without slipping or rubbing. 7. Check materials. Breathable, cotton-lined, washable materials work well in India's heat. Neoprene may cause sweat rash. 8. Buy from a seller with a return option; see equipment returns, warranty and servicing. 9. Ask a physiotherapist to check the fit if possible.

Wearing it safely

• Put it on in the morning, before swelling builds, with clean, dry skin.
• Wear a thin cotton sock under it to reduce friction.
• Remove it at rest and at night unless advised.
• Inspect your skin daily, particularly the heel, ankle bones and the top of the foot. Look for redness, blisters, dents and marks. If you cannot feel your feet, ask a family member to check.
• Check the toes for colour, warmth and movement.
• Do not wear it for hours if it causes numbness, tingling or swelling below the support.
• Keep the support clean and dry; wash regularly; dry in the shade.
• Replace when stretched or worn.

Strength and balance matter more

A brace cannot replace strong ankle and calf muscles. A physiotherapist can teach exercises, such as heel raises, ankle circles, toe taps, standing on one leg with support, and balance practice; see balance exercises for seniors, balance pad guide and resistance bands guide. Walking aids may help; see how to choose a walking stick. A gait assessment by a physiotherapist can identify the cause of tripping; see physiotherapist gait assessment.

Managing swelling at home

If a doctor has found no serious cause and said home measures are fine:

• Raise the legs above heart level for periods in the day, with a pillow, not just a footstool; see leg elevation pillow guide.
• Move the ankles often. Avoid sitting or standing still for long periods; do ankle pumps.
• Avoid tight clothing around the legs, and tight garters.
• Reduce salt if advised.
• Compression stockings only if the doctor agrees; see compression stockings guide.
• Keep skin moisturised and intact.
• Weigh yourself regularly if you have heart failure, and report sudden gain; see daily weights in heart failure.

Falls and safety

Weak ankles are a risk for falls. Make the home safer: good light, no loose rugs, grab bars and sturdy footwear; see falls risk assessment at home and flooring, rugs and trip hazards. After a fall, see what to do after a fall.

When to ask a professional

See a doctor for swelling that is sudden, one-sided, painful, red or warm, swelling with breathlessness or chest pain, swelling that keeps worsening, an ankle injury with inability to bear weight or deformity, or any numb, pale, cold or discoloured foot. A physiotherapist can assess and teach exercises and fit. A podiatrist can check feet and footwear. An orthotist can make custom braces. A pharmacist can advise on skin reactions.