ConditionInjuries & poisoning
Soft Tissue Injury
A soft tissue injury is damage to muscles, ligaments, tendons or other connective tissue rather than bone. The main types are sprains (stretched or torn ligaments, such as an ankle sprain), strains (muscle or tendon tears, such as a pulled hamstring), contusions (bruises) and tendon overuse injuries. They cause pain, swelling, bruising and reduced movement. Most heal in days to weeks with early protection, gentle movement and gradual loading. Severe tears, inability to bear weight or a deformity need medical assessment.
Also called: Sprains and strains, musculoskeletal soft tissue injury, sports injury, pulled muscle
At a glance
- What it is
- Injury to muscles, tendons, ligaments or other soft tissues.
- Main types
- Sprains (ligaments), strains (muscles and tendons), contusions (bruises), tendinopathy (overuse).
- Grades
- 1 (stretch), 2 (partial tear), 3 (complete tear).
- First aid
- PEACE and LOVE: protect, elevate, avoid anti-inflammatories early, compress, educate, then load, optimism, vascularization, exercise.
- Healing
- Grade 1 in 1 to 3 weeks; grade 2 in 3 to 8 weeks; grade 3 months or surgery.
- See a doctor
- Unable to bear weight, deformity, numbness, a pop with weakness, or no improvement after 1 to 2 weeks.
When to get help
Call 911 or go to the ER
- A visibly deformed limb, bone through the skin, or a cold, pale or numb hand or foot
- Severe pain with tight, rapidly increasing swelling and pain on moving the fingers or toes (possible compartment syndrome)
- A head, neck or back injury with numbness, tingling or weakness
See a doctor within a day or two
- Unable to take 4 steps, or unable to use the limb, after an injury
- Pain directly over a bone, especially the ankle bones, base of the fifth toe bone or the navicular
- A pop with sudden weakness, such as being unable to push off the foot or straighten the knee (possible tendon rupture)
- A joint that feels unstable or gives way
- Signs of infection: increasing redness, warmth, red streaks or fever
Book a routine appointment
- Pain and swelling not improving after 1 to 2 weeks of self-care
- Repeated sprains of the same joint
- Ongoing pain with activity weeks after an injury
Usually safe to manage at home
- A mild sprain, strain or bruise with mild swelling, able to walk or use the limb, improving day by day
Types of soft tissue injury
| Type | What is injured | Common examples | Typical cause |
|---|---|---|---|
| Sprain | Ligament (bone to bone) | Ankle sprain, wrist sprain, knee ligament injury | Twisting, rolling, falling |
| Strain | Muscle or tendon | Hamstring, calf, groin, back, neck strain | Overstretching, sudden contraction |
| Contusion | Muscle and tissue bruising | Thigh (quadriceps) contusion, "dead leg" | Direct blow |
| Tendinopathy | Tendon overload | Achilles, patellar, rotator cuff, tennis elbow | Repetitive overuse |
| Tendon rupture | Complete tendon tear | Achilles rupture, biceps rupture | Sudden forceful load |
| Bursitis | Fluid sac near joints | Shoulder, elbow, hip | Overuse, pressure |
Grades of sprains and strains
| Grade | Damage | Signs | Typical recovery |
|---|---|---|---|
| 1 | Stretch or microscopic tears | Mild pain and swelling, normal strength and stability | 1 to 3 weeks |
| 2 | Partial tear | Moderate pain, swelling, bruising, some loss of function | 3 to 8 weeks |
| 3 | Complete tear | Severe pain or sometimes little pain, marked swelling, instability or loss of function | Months; sometimes surgery |
Symptoms
- pain, often worse with movement or stretching
- swelling, which peaks over 24 to 72 hours
- bruising, which may track down the limb
- stiffness and reduced range of motion
- weakness
- a pop or tearing sensation at the time of injury
- joint instability with ligament tears
Diagnosis
Most soft tissue injuries are diagnosed by history and examination: how the injury happened, where it hurts, swelling, bruising, strength and joint stability. Tests are used when needed:
- X-ray to rule out fracture, guided by rules such as the Ottawa ankle rules
- Ultrasound for muscle and tendon tears
- MRI for suspected complete ligament tears, cartilage damage or injuries not improving
First aid and early treatment: PEACE and LOVE
Modern advice has moved from strict rest and ice (RICE) toward protecting the injury briefly and then moving and loading it early.
In the first 1 to 3 days, PEACE:
- Protect: limit painful movement for 1 to 3 days
- Elevate: raise the limb above the heart
- Avoid anti-inflammatories and lots of ice in the first days, as they may slow tissue healing; acetaminophen (paracetamol) is an option for pain
- Compress: use an elastic bandage or tape to limit swelling
- Educate: understand that recovery is active and that most injuries heal well
After the first days, LOVE:
- Load: gradually return to normal activity guided by pain
- Optimism: confidence supports recovery
- Vascularization: pain-free cardio exercise increases blood flow
- Exercise: restore movement, strength and balance
Ice can still be used for short periods to ease pain. NSAIDs such as ibuprofen may be used later for pain if safe for you; avoid them with kidney disease, stomach ulcers or blood thinners.
Rehabilitation
- range-of-motion exercises once pain allows
- progressive strengthening of the injured area and surrounding muscles
- balance and proprioception training, especially after ankle and knee sprains, to prevent recurrence
- sport-specific drills before full return
A physical therapist can guide recovery, especially for grade 2 and 3 injuries or recurrent problems.
When surgery is needed
Surgery is considered for complete tendon ruptures (such as Achilles or biceps in active people), some complete ligament tears with instability (such as the ACL), and injuries that fail to improve with rehabilitation.
Prevention
- warm up before activity
- build training load gradually
- strengthen muscles around vulnerable joints
- use balance training after ankle sprains
- wear appropriate footwear and braces or taping when advised
- avoid exercising when very fatigued
Frequently asked questions
What is the difference between a sprain and a strain?
A sprain is an injury to a ligament, which connects bone to bone, usually from twisting a joint such as the ankle. A strain is an injury to a muscle or tendon, often from overstretching or a sudden contraction, such as a pulled hamstring.
How long does a soft tissue injury take to heal?
Mild sprains and strains usually improve within 1 to 3 weeks. Moderate injuries with partial tears take 3 to 8 weeks. Complete tears can take several months and sometimes need surgery.
Should I use ice or heat on a soft tissue injury?
In the first days, short periods of ice can ease pain, but large amounts may slow healing. Compression and elevation help swelling. After the first few days, gentle movement and, if helpful, heat to relax tight muscles support recovery.
When should I see a doctor for a sprain or strain?
See a doctor if you cannot bear weight or use the limb, there is pain directly over a bone, a deformity, numbness, a pop with sudden weakness, instability, or if the injury is not improving after 1 to 2 weeks.
Is RICE still recommended?
RICE (rest, ice, compression, elevation) has largely been replaced by PEACE and LOVE, which encourages brief protection followed by early movement and gradual loading. Complete rest for long periods can slow recovery.
Sources
This guide was written from current patient and clinical guidance, including:
- British Journal of Sports Medicine: Soft-tissue injuries simply need PEACE and LOVE (Dubois and Esculier, 2020)
- American Academy of Orthopaedic Surgeons (OrthoInfo): Sprains, Strains and Other Soft-Tissue Injuries
- MedlinePlus: Sprains and strains
- NHS: Sprains and strains
- American College of Sports Medicine: Ankle sprain prevention and management