Fractures, Sprains and Strains: First Aid Splinting Guide
Musculoskeletal injuries — fractures, dislocations, sprains, and strains — are among the most common reasons people seek first aid. The American Academy of Orthopaedic Surgeons reports that the average person experiences two to three significant musculoskeletal injuries over a lifetime. Knowing how to recognize the type of injury, immobilize the affected area, and decide when emergency care is needed can reduce pain, prevent further damage, and improve long-term outcomes. This guide covers the RICE protocol for soft tissue injuries, splinting techniques for suspected fractures, and the signs that distinguish a simple sprain from a more serious break or dislocation.
Distinguishing Fractures, Sprains, Strains, and Dislocations
Before treating any injury, you must understand what type of tissue damage is present. Each has distinct characteristics and requires a slightly different first aid approach.
A fracture is a break in the continuity of a bone. Fractures range from hairline (stress) fractures, where the bone cracks but does not separate, to complete fractures, where the bone breaks into two or more pieces. An open (compound) fracture occurs when the broken bone penetrates the skin, creating a direct pathway for infection and requiring urgent surgical care. Closed fractures remain within intact skin.
A dislocation occurs when the ends of two bones that normally meet at a joint are forced out of alignment. Common sites include the shoulder, elbow, finger, hip, and knee. Dislocations damage the surrounding ligaments and joint capsule and can compromise blood flow to the limb beyond the joint.
A sprain is an injury to a ligament — the fibrous tissue connecting bone to bone at a joint. Sprains are graded by severity. Grade 1 involves stretching and microscopic tearing; the joint may be mildly painful and swollen but remains stable. Grade 2 involves partial tearing of the ligament with moderate swelling, bruising, and some joint instability. Grade 3 is a complete ligament rupture, resulting in significant swelling, bruising, and joint instability.
A strain is an injury to a muscle or tendon — the tissue connecting muscle to bone. Strains also range from mild (muscle “pull”) to severe (complete tendon rupture). The RICE protocol applies to both sprains and strains in the acute phase.
Signs and Symptoms of a Fracture
The American Red Cross teaches the “PM+MS” mnemonic for fracture assessment: Pain (especially at a specific point over the bone), Pallor (pale skin distal to the injury), Pulses (check for pulse below the injury — its absence indicates vascular compromise), Paralysis (inability to move the limb), Paresthesia (numbness or tingling), and Swelling and Deformity (visible angulation, shortening, or rotation of the limb).
Other signs include a grating sensation (crepitus) when the bone ends rub together — do not test for this deliberately, as it causes pain and further damage. Visible bone protruding through the skin indicates an open fracture. The mechanism of injury is also informative: high-energy mechanisms (falls from height, motor vehicle collisions, sports impacts) are more likely to produce fractures than low-energy mechanisms.
The Mayo Clinic advises that any injury with significant swelling, inability to bear weight or use the limb, or point tenderness over a bone should be presumed to be a fracture until X-ray confirms otherwise. Splinting and immobilization are appropriate while awaiting medical evaluation.
The RICE Protocol for Sprains and Strains
RICE stands for Rest, Ice, Compression, Elevation. The American Red Cross and the American Academy of Family Physicians recommend RICE as the standard acute treatment for sprains, strains, and soft tissue contusions.
Rest means discontinuing activity immediately. Continuing to use an injured joint or muscle worsens the damage and prolongs recovery. Protective weight bearing — using crutches for an ankle sprain or a sling for a shoulder injury — prevents further injury while the tissue begins to heal.
Ice reduces swelling and pain. Apply an ice pack wrapped in a thin cloth — never directly on the skin — to the injured area for 15 to 20 minutes at a time. Repeat every 2 to 3 hours during the first 48 hours. The AHA notes that ice constricts blood vessels, limiting the inflammatory response. After 48 hours, heat may be used for muscle relaxation, but ice remains beneficial for ongoing swelling.
Compression limits swelling and provides support. Wrap the injured area with an elastic (ACE) bandage, starting distally and wrapping proximally. The wrap should be snug but not tight — if the person experiences numbness, tingling, or increased pain, the wrap is too tight and should be loosened. Remove elastic bandages before sleeping.
Elevation reduces swelling by using gravity to facilitate venous and lymphatic drainage. Elevate the injured limb above heart level whenever possible. For a sprained ankle, for example, the foot should be higher than the hip. Consistent elevation during the first 24 to 72 hours significantly reduces swelling and pain.
Splinting Techniques for Suspected Fractures
Splinting immobilizes a suspected fracture to prevent movement of the broken bone ends, which reduces pain, prevents further soft tissue damage, and protects the surrounding nerves and blood vessels. The WHO Emergency Triage Assessment and Treatment guidelines emphasize that proper splinting should immobilize the joint above and the joint below the suspected fracture.
The ideal splint material is rigid, well-padded, and long enough to span the required distance. Commercial splints — padded aluminum SAM splints, board splints, or vacuum splints — are ideal. In their absence, improvised splints can be made from rolled newspapers or magazines, cardboard, wooden boards, pillows, or even the injured person’s opposite leg (for lower extremity injuries) or torso (for arm injuries). Pad the splint with cloth or gauze to prevent pressure points.
For an upper arm or forearm fracture, apply a splint and then support the arm with a sling. A sling can be made from a triangular bandage, a pillowcase, or a shirt. Secure the sling with a bandage around the chest to prevent arm movement. For a lower leg fracture, gently support the limb in its current position, pad between the legs, and bind the injured leg to the uninjured leg using wide bandages or cloth strips at the ankles, below the knee, and above the knee.
The American Academy of Orthopaedic Surgeons provides these principles: splint in the position found — do not attempt to realign or straighten an angulated bone. Apply the splint without moving the limb excessively. Check circulation (pulse, sensation, and capillary refill) before and after splinting. If a finger or toe becomes pale, blue, or numb after splinting, loosen the bandages immediately.
Special Considerations for Open Fractures and Dislocations
An open fracture requires specific first aid that differs from closed fracture management. The CDC emphasizes that the primary goal is preventing infection of the bone (osteomyelitis). Do not attempt to push protruding bone back under the skin. Cover the exposed bone and wound with sterile saline-moistened gauze if available, or with clean dry gauze. Apply gentle pressure around the wound edges to control bleeding — not directly over the protruding bone. Immobilize the limb in the position found and transport the person to an emergency department immediately. Open fractures require urgent surgical irrigation and debridement plus intravenous antibiotics.
For dislocations, the rule is equally clear: do not attempt to reduce (relocate) the joint in the field unless you are a trained medical professional and a pulse is absent below the injury. Attempting to reduce a dislocation without proper technique can fracture the bone, damage the nerves and blood vessels, or convert a simple dislocation into a complex fracture-dislocation. Immobilize the joint in its current position and transport the person for X-ray-guided reduction. The Mayo Clinic notes that certain dislocations — particularly of the shoulder, patella, and fingers — can sometimes be reduced by experienced providers in the field, but the safest course is emergency department management.
Signs of Serious or Complicated Injury
Certain findings require immediate emergency medical services rather than simple first aid and transport. Call 911 or activate EMS for any of the following: open fracture, deformity or angulation, loss of pulse or sensation below the injury, the limb is cold or blue, the injury involves the spine or pelvis, the person has multiple injuries or altered mental status, or the mechanism of injury is high-energy (fall from height, motor vehicle collision, penetrating trauma).
Pelvic fractures and femur fractures can cause life-threatening internal bleeding. The American College of Surgeons notes that a closed femur fracture can lose 1 to 2 liters of blood into the thigh, and pelvic fractures can lose several liters. These injuries require rapid transport to a trauma center.
Spinal injuries demand extreme caution. If a spinal injury is suspected — due to the mechanism of injury (fall, diving, motor vehicle crash), neck or back pain, numbness or weakness in the extremities, or loss of bowel or bladder control — do not move the person unless they are in immediate danger (fire, flooding, unstable structure). Maintain manual in-line stabilization of the head and neck until trained emergency personnel arrive with a backboard and cervical collar.
FAQ
How can I tell if an injury is a sprain or a fracture?
It is often difficult to distinguish without X-ray. In general, fractures produce point tenderness directly over the bone, visible deformity, and inability to bear weight or use the limb. Sprains produce more diffuse tenderness over a joint and may or may not allow weight bearing. When in doubt, treat as a fracture and seek medical evaluation.
Can you walk on a fractured ankle?
Some people can put weight on a fractured ankle, especially with a hairline fracture. Inability to take more than 3 to 4 steps immediately after injury is a strong predictor of fracture. However, bear in mind that some fractures are stable enough to permit partial weight bearing.
How long should I ice a sprain?
Apply ice for 15 to 20 minutes every 2 to 3 hours during the first 48 hours. Continue icing if swelling persists beyond 48 hours. Never apply ice directly to the skin, as it can cause frostbite.
When is a splint too tight?
A properly applied splint allows full circulation. Signs of excessive tightness include numbness, tingling, pale or blue skin distal to the splint, increased pain, or inability to move the fingers or toes. Loosen the bandages immediately if these occur.
Should I take ibuprofen for a fracture?
Non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen and naproxen are effective for pain and swelling. However, some orthopedic surgeons express concern that NSAIDs may slow bone healing. Acetaminophen is a reasonable alternative. Discuss pain management with your healthcare provider.
Internal links: For cleaning and dressing open wounds associated with fractures, see wound care basics. For management of burn injuries that may accompany trauma, see burns treatment.