Muscle Contusion: Symptoms, Causes and Treatment

A muscle contusion is a bruise caused by a direct blow that damages muscle fibres and small blood vessels without breaking the skin.

Blood and fluid can collect within or around the muscle, causing tenderness, swelling and a change in skin colour. A contusion is sometimes called a muscle bruise, dead leg or charley horse. It is different from a muscle strain, which happens when muscle fibres are overstretched or torn.

Common symptoms include pain at the point of impact, tenderness when touched, swelling, bruising and stiffness. Moving or contracting the affected muscle may feel uncomfortable, and a larger bruise can limit walking or sport. A muscle contusion commonly presents with calf pain or thigh pain when those areas are struck.

Seek prompt medical assessment if pain is severe, swelling increases quickly, the limb feels unusually tight or numb, or you cannot use it normally after an injury. These features can signal a more significant injury than a simple bruise.

A contusion usually follows a direct impact, such as a collision, fall, blow from equipment or contact during sport. The force compresses muscle against bone and can injure small blood vessels. The thigh and calf are frequent sites, but any muscle can be affected.

Pain and swelling may be most noticeable soon after the impact, while bruising can become clearer as blood moves through nearby tissue. Gentle movement is often reintroduced as discomfort settles. Recovery depends on the depth and size of the injury, the muscle involved and whether activity is increased too quickly.

Contact sport, work or activities with falls and moving equipment increase exposure to direct blows. Previous injury, returning to demanding activity before strength and movement have recovered, and poor protective technique can also make another contusion more likely.

A clinician asks how the injury occurred and examines bruising, swelling, tenderness, range of motion and muscle strength. They may compare both sides and check circulation and sensation. Imaging is considered when a fracture, deep collection of blood or a more serious muscle injury is suspected.

Early care usually aims to protect the area, reduce aggravating activity and support comfortable movement. Cold therapy may help with pain and swelling soon after an injury; heat is often considered later when stiffness is the main problem. Use either safely and follow a clinician's advice, especially if sensation or circulation is reduced.

As symptoms improve, physiotherapy can guide mobility, gradual strengthening, balance and a return to work or sport. Sports massage may be useful later for selected soft-tissue problems, but firm pressure over a fresh bruise can worsen bleeding and pain.

Keep daily movement within a comfortable range and avoid repeatedly testing the painful area. Support the limb when resting, follow the rehabilitation plan and increase activity in small steps. Pain that keeps worsening, returns sharply with exercise or is accompanied by weakness deserves reassessment.

A deep contusion can leave persistent swelling, restricted movement or weakness. Rarely, bleeding within a confined muscle compartment can raise pressure and threaten nerves or circulation. Sudden severe pain, marked tightness, numbness, pale or cool skin, or rapidly worsening function needs urgent care.

Use appropriate protective equipment for contact activities, learn safe movement and follow the rules of the activity. Build strength and conditioning gradually, warm up before demanding exercise and allow an earlier injury to recover before full-contact work.

A sports medicine clinician, orthopaedic clinician or physiotherapist can help when a bruise is extensive, movement remains limited, symptoms are not settling or you need a structured return to activity. Bring details of the impact, changes in swelling and what movements are difficult.