Sprain or Strain? How to Tell the Difference and What to Do

Sprain vs strain: the difference

Both are graded by severity:

Is it sprained or broken?

Fractures and sprains can look alike. Clues that a bone may be broken:

• you heard or felt a crack
• the limb looks deformed
• you cannot bear weight at all
• pain is sharply focused on one spot of bone when pressed
• swelling and bruising are severe and rapid

For ankles and feet, doctors use the Ottawa ankle and foot rules: an X-ray is needed if you cannot take 4 steps, or there is tenderness at the back edge or tip of either ankle bone, the base of the fifth metatarsal (outer midfoot), or the navicular (inner midfoot). If none apply, a fracture is very unlikely. See fracture.

Wrist injuries from a fall on an outstretched hand need special care: tenderness in the "anatomical snuffbox" at the base of the thumb suggests a scaphoid fracture, which can be missed on the first X-ray. See sprained wrist.

Symptoms of sprains and strains

• pain, especially with movement or use
• swelling, which peaks over 24 to 72 hours
• bruising, which may track down the limb over several days
• stiffness and limited movement
• weakness or difficulty bearing weight
• muscle spasms and cramping (strains)
• instability or giving way (more severe sprains)

Trunk strain symptoms

Strains of the back, side (oblique) and chest wall (intercostal) muscles cause:

• pain that is worse with bending, twisting, coughing, sneezing or deep breaths
• muscle spasm and tenderness when you press on the muscle
• stiffness, especially after rest or on waking
• no leg numbness or weakness, which would suggest nerve involvement

Chest wall pain with breathlessness, sweating, or pain spreading to the arm or jaw should be treated as possible heart or lung problems, not a strain.

Can a severe wrist strain cause a swollen hand and arm?

Yes. Swelling from a wrist sprain or strain often spreads into the back of the hand and fingers, and bruising can track up the forearm or down into the fingers over a few days because of gravity. Keep the hand raised above heart level and remove rings early. Swelling that is tight and very painful, with numbness or color change in the fingers, needs urgent assessment for a fracture or compartment syndrome.

First aid for the first 72 hours

The aim is to limit swelling and protect the tissue without immobilizing it too long.

• Protect: use a brace, wrap, sling or crutches for the first 1 to 3 days. Avoid activities that cause sharp pain.
• Elevate: raise the injured part above the level of your heart as often as possible.
• Compress: an elastic bandage reduces swelling. It should be snug, not tight. Loosen it if the toes or fingers tingle, go numb or change color.
• Ice for comfort: 15 to 20 minutes at a time, wrapped in a cloth, every 2 to 3 hours. Ice eases pain, though it does not speed healing.
• Avoid harm: in the first 2 to 3 days, avoid heat, alcohol, massage and running on the injury.
• Pain relief: acetaminophen (paracetamol) at the label dose. Ibuprofen or naproxen also help pain. Avoid NSAIDs if you have kidney disease, stomach ulcers, take blood thinners or are pregnant.

Recovery: from rest to movement

After the first few days, gentle movement speeds healing.

1. Days 3 to 7: start pain-free range-of-motion exercises, such as ankle circles or gentle stretches. Walk normally when you can.
2. Weeks 1 to 3: add strengthening and balance exercises. For ankle sprains, single-leg balance work cuts the risk of re-injury.
3. Weeks 3 onward: gradually return to sport-specific movements. Stop if pain increases sharply.

Return to sport when you have full movement, near-normal strength, and can hop, run and change direction without pain. Returning too early is the main cause of repeat sprains and chronic instability.

How doctors diagnose and treat more serious injuries

A doctor or physical therapist will examine the joint's stability, the muscle's strength and the exact location of tenderness. Tests may include X-rays to rule out fracture, ultrasound to assess tendon and muscle tears, and MRI for ligament and cartilage damage in the knee or shoulder.

Severe injuries may need a walking boot, splint or cast for a few weeks, structured physical therapy, or surgery for complete tears such as an ACL rupture, Achilles tendon rupture, thumb ligament tear (skier's thumb) or chronically unstable ankle.

Preventing sprains and strains

• Warm up for 5 to 10 minutes before exercise and build training load gradually.
• Strengthen and stretch the hips, core and legs. Balance training protects ankles and knees.
• Wear supportive footwear suited to the sport and surface.
• Lift with your legs, keep loads close, and avoid twisting while lifting.
• Brace or tape a previously sprained ankle for sport in the first year.
• Rest when fatigued, as tired muscles strain more easily.

Frequently asked questions

What is the difference between a sprain and a strain?

A sprain injures a ligament, the band that connects bone to bone at a joint, usually from twisting. A strain injures a muscle or tendon, usually from overstretching or overloading. Sprains are most common in the ankle, knee and wrist, and strains in the back, hamstring and calf.

How do I know if I sprained or broke something?

A fracture is more likely if you heard a crack, cannot bear weight, the limb looks deformed, or pressing directly on the bone is very painful. For ankles, being unable to take 4 steps or tenderness at the tips or back of the ankle bones means you need an X-ray.

How long does a sprain or strain take to heal?

Mild sprains and strains usually heal in 1 to 3 weeks, moderate ones in 3 to 8 weeks, and complete tears can take several months. Early, gradual movement and strengthening exercises speed recovery and reduce the chance of re-injury.

Should I use ice or heat for a sprain?

Use ice for the first 2 to 3 days to ease pain and swelling, 15 to 20 minutes at a time with a cloth between ice and skin. Avoid heat in this early phase as it can increase swelling. After a few days, gentle heat before exercises can help stiffness.

Is it better to rest or move a sprain?

Rest and protect it for the first 1 to 3 days, then start gentle, pain-free movement. Long immobilization causes stiffness and weakness and slows recovery. Most sprains do better with early, guided activity than with complete rest.

When should I see a doctor for a sprain or strain?

See a doctor if you cannot bear weight, the limb is deformed, there is numbness or color change, you heard a pop with rapid swelling, pressing on the bone hurts, or you are not improving after 5 to 7 days of home care.