Quadriceps Contusion (Thigh Bruise or Dead Leg)

First aid for a dead leg

In the first 24 to 48 hours:

1. Stop playing and rest the leg.
2. Ice for 15 to 20 minutes every 2 to 3 hours, with a cloth between ice and skin.
3. Hold the knee bent: for moderate or severe contusions, keeping the knee bent at about 120 degrees (using an elastic wrap or brace) for the first 24 hours limits bleeding and stiffness and has been linked to faster recovery.
4. Compression with an elastic bandage, not too tight.
5. Elevate the leg when resting.
6. Use crutches if walking is painful.
7. Avoid "HARM": Heat, Alcohol, Running and Massage in the first 48 to 72 hours, which can increase bleeding.
8. Pain relief: acetaminophen (paracetamol) is often preferred in the first 24 to 48 hours. NSAIDs such as ibuprofen can be used later at the label dose.

Grading severity

Severity is judged by how far the knee can bend 12 to 24 hours after injury, lying face down or on your back:

Symptoms

• Pain at the front or side of the thigh, worse with bending the knee or tightening the muscle
• Swelling and a firm, tender area or lump
• Bruising, which may track down toward the knee over a few days
• Stiffness and reduced knee bending
• Limping and weakness

Diagnosis

Diagnosis is usually based on the history and examination, including measuring knee bending. Imaging is used if severe:

• Ultrasound or MRI to assess the size of the bleed and muscle damage
• X-ray to rule out a fracture, and after 2 to 4 weeks to look for myositis ossificans if a firm lump persists
• Compartment pressure measurement if compartment syndrome is suspected

Treatment and rehabilitation

Phase 1: protect (first 24 to 72 hours)

Rest, ice, compression, keeping the knee bent and elevation, as above.

Phase 2: restore movement (after 2 to 3 days)

• Gentle, pain-free knee bending and straightening exercises
• Static quadriceps contractions
• Stationary cycling and swimming as pain allows
• Gradually increase walking

Phase 3: strength and return to sport

• Progressive strengthening: squats, lunges, step-ups
• Running, then sprinting and sport-specific drills
• Return to contact sport when you have full pain-free knee bending, full strength and can sprint, jump and change direction without pain
• Wear thigh padding to protect against re-injury

Forceful stretching or massage too early can worsen bleeding and increase the risk of myositis ossificans.

Complications

• Myositis ossificans: bone forms within the injured muscle, typically after severe or repeated contusions, causing a hard, painful lump and stiffness. It usually develops 2 to 4 weeks after injury and is seen on X-ray. Most cases settle with time and rehabilitation.
• Compartment syndrome: rare in the thigh but an emergency, from bleeding raising pressure in the muscle compartment.
• Re-injury if returning to sport too early.
• Large hematoma occasionally needing drainage.

Contusion vs strain

Frequently asked questions

What is a dead leg?

A dead leg is a deep bruise (contusion) of the thigh muscle, usually the quadriceps, caused by a direct blow such as a knee in contact sports. It causes pain, swelling, stiffness and difficulty bending the knee. Most heal within a few weeks.

How long does a quadriceps contusion take to heal?

Mild contusions usually heal in 1 to 2 weeks, moderate ones in 2 to 4 weeks, and severe ones in 4 to 6 weeks or longer. Severity is judged by how far you can bend your knee 12 to 24 hours after the injury.

Should I massage a dead leg?

Not in the first few days. Massage, heat, alcohol and running in the first 48 to 72 hours can increase bleeding in the muscle and raise the risk of myositis ossificans. Gentle massage may be introduced later during rehabilitation, once swelling has settled.

What is myositis ossificans?

Myositis ossificans is the formation of bone inside a muscle after a significant bruise, most commonly in the thigh. It causes a firm, painful lump and stiffness, usually appearing 2 to 4 weeks after injury. Most cases improve over months with rest and gradual rehabilitation.