A thigh contusion, also known as a dead leg or charley horse, is caused by a direct impact to the muscle, crushing it against the bone and causing internal bleeding.
Medically reviewed by Dr Chaminda Goonetilleke, 14th Feb. 2022
A thigh contusion is different from a thigh strain, which involves a tear in the quadriceps muscle.
Symptoms of a thigh contusion
Symptoms include:
- Pain at the time of injury
- Restricted movement and difficulty running
- Walking may be painful
- Rapid swelling
- Bruising may or may not appear
How bad is my thigh contusion?
Thigh contusions range from mild to severe. More serious injuries can significantly limit walking and movement. They are graded from 1 to 3 based on severity.
Grade 1 thigh contusions
The muscle may feel tight and slightly sore. You may walk with a mild limp, but swelling is usually minimal. Range of movement is almost normal, and strength is only slightly reduced.
Grade 2
Walking becomes painful and more difficult. You may feel occasional sharp twinges. Swelling is more noticeable, and straightening the knee against resistance is painful. Pressing on the injury site will also cause discomfort.
Grade 3
A severe contusion can make walking difficult without assistance. Pain is intense, and swelling develops rapidly. A visible bulge or gap in the muscle may appear, indicating significant muscle damage.
Recovery can take several weeks, and time away from sport is often between 3 and 12 weeks.
Although a dead leg or charley horse may seem minor, a proper diagnosis is important. If not treated correctly, a thigh contusion can lead to long-term problems or permanent muscle damage.
Causes & anatomy
A thigh contusion is caused by a direct impact to the muscle, crushing it against the bone underneath and causing bleeding within the tissue.
Skeletal muscle is made up of bundles of fibres surrounded by a protective sheath. When a contusion occurs, bleeding develops within the muscle.
The type of injury depends on whether this bleeding remains contained within the muscle or spreads outside it.
Thigh contusions are classified as intramuscular (bleeding contained within the muscle) or intermuscular (bleeding that spreads outside the muscle).
Intramuscular hematoma (bleeding contained within the muscle)
Bleeding remains contained within the muscle.
- Pressure builds quickly
- Pain and stiffness increase
- Bruising is often limited
Recovery may take longer due to restricted fluid drainage.
Intermuscular hematoma (bleeding spreads outside the muscle)
Bleeding spreads outside the muscle.
- Bruising is more visible
- Swelling may reduce faster
- Movement is often better than intramuscular injuries
Bruising may appear away from the injury site as blood tracks through surrounding tissue.
Treatment for thigh contusions
Apply the PRICE principle (protection, rest, ice, compression and elevation) as soon as possible after injury.
Cold therapy
Apply ice and compression as soon as possible.
- Apply for 10 minutes every 2 hours during the first 72 hours
- Do not apply ice directly to the skin
- Use a towel or compression wrap
Avoid heat or massage early, as this can worsen the injury.
It is important to control bleeding and swelling early. Applying heat or deep massage too soon may increase bleeding or lead to myositis ossificans (abnormal bone formation within the muscle).
Rest
Rest is important for at least the first 24 to 48 hours. More severe injuries may require longer.
Thigh supports
Use a compression bandage or thigh support to help reduce swelling and protect the muscle.
A simple elastic or tube support is suitable in the early stage. Later, a neoprene support may help retain warmth and support recovery.
Elevation
Elevate the leg where possible to help reduce swelling and allow fluid to drain away from the injury.
Heat
Apply heat only after the acute phase (usually from day 3 to 4, and later for more severe injuries). Use a hot water bottle, heat pack or warm bath.
Your physio may use ultrasound to speed up recovery.
Massage
Massage ONLY once the acute phase has fully settled. Massaging too early can increase bleeding and cause further muscle damage.
Stretching exercises for thigh contusions
Begin gentle stretching only once the acute phase has settled and it is pain-free to do so. This is usually after 48 hours, but it may take longer in more severe injuries.
Strengthening exercises for thigh contusions
Begin strengthening exercises as soon as they can be performed pain-free.
Start with simple exercises daily or twice daily, then progress gradually as comfort improves. If the muscle becomes sore, allow more recovery time. Training 2 to 3 times per week is often sufficient in later stages.
- Grade 1: Start strengthening early once pain allows
- Grade 2: Delay strengthening for around 5 to 7 days
- Grade 3: Strengthening will be delayed further
All sessions should include a gentle warm-up and finish with stretching. Continue exercises for a few weeks after symptoms have resolved.
If you cannot train normally, maintain fitness with low-impact options such as cycling or swimming, or focus on upper-body training.
Returning to full fitness
Return to activity gradually.
For mild injuries, normal training may resume within a few days. More severe injuries require a longer progression.
Build up from light jogging to running comfortably for up to 40 minutes before introducing speed work.
Progress speed gradually. For example:
- Start with short runs at around 50% effort
- Increase to 70% effort in later sessions
Maintain stretching and strengthening throughout to restore full strength and mobility.
Read more on thigh injury rehabilitation exercises.
