Burns Treatment: First Aid for Thermal, Chemical and Electrical Burns

Burns are among the most painful and potentially devastating injuries a person can sustain. The WHO reports that burns cause approximately 180,000 deaths annually worldwide, with the majority occurring in low- and middle-income countries. In the United States, the American Burn Association estimates that 450,000 burn injuries receive medical treatment each year, with roughly 40,000 requiring hospitalization. The correct first aid during the first minutes after a burn injury dramatically influences healing time, scarring, and long-term function. This guide covers burn classification by depth and severity, cooling and dressing protocols for thermal burns, chemical and electrical burn management, and clear criteria for when professional medical care is necessary.

Understanding Burn Depth and Severity

Burns are classified by the depth of tissue destruction and by the total body surface area (TBSA) involved. The major North American burn organizations — the American Burn Association and the American College of Surgeons — use a standardized classification system.

First-degree burns involve only the epidermis, the outermost layer of skin. The skin is red, dry, and painful, but there is no blistering. Sunburn is the classic example. First-degree burns typically heal within 3 to 7 days without scarring. First aid focuses on pain relief and moisturization.

Second-degree burns (partial thickness) extend through the epidermis into the dermis. These burns are characterized by intense pain, redness, swelling, and blister formation. The skin appears wet, weeping, or blistered. Superficial second-degree burns heal within 2 to 3 weeks with minimal scarring. Deep second-degree burns may take longer and may require surgical intervention.

Third-degree burns (full thickness) destroy both the epidermis and dermis and extend into subcutaneous tissue. The skin may appear white, waxy, leathery, brown, or charred. Paradoxically, third-degree burns are often less painful than second-degree burns because the nerve endings have been destroyed. These burns require surgical excision and skin grafting and will not heal on their own if larger than a small area.

Fourth-degree burns extend through skin and subcutaneous tissue into muscle, tendon, or bone. These are the most severe burns and require extensive surgical management, often including amputation. Fourth-degree burns are most commonly caused by high-voltage electrical injury or prolonged contact with flames.

The “rule of nines” is used to estimate TBSA involvement. The head and neck represent 9 percent, each arm 9 percent, the anterior trunk 18 percent, the posterior trunk 18 percent, each leg 18 percent, and the perineum 1 percent. For children, the proportions differ due to their larger head size. The palm of the person’s hand (including fingers) represents approximately 1 percent of their body surface, useful for estimating smaller burns.

Immediate First Aid for Thermal Burns

The American Red Cross and the American Burn Association agree on the following sequence for thermal burns — those caused by fire, hot liquids (scalds), steam, or contact with hot surfaces.

Stop the burning process. Remove the person from the source of heat. If clothing is on fire, use the “stop, drop, and roll” technique. Remove smoldering clothing and any jewelry or tight items near the burn area, as swelling will occur rapidly.

Cool the burn immediately. Apply cool — not cold — running water to the burn for 10 to 20 minutes. The water temperature should be 15°C to 25°C (59°F to 77°F). The CDC notes that cooling within 30 minutes of injury reduces burn depth, pain, and healing time by limiting the spread of heat through tissue. Do not use ice or ice water, which causes vasoconstriction and can convert a partial-thickness burn to a full-thickness injury. For large burns exceeding 20 percent TBSA, cooling beyond 10 minutes may induce hypothermia, so proceed with caution and monitor the person’s temperature.

After cooling, cover the burn loosely with a sterile, non-stick dressing or clean cloth. The Mayo Clinic recommends using plastic wrap (cling film) as an excellent temporary dressing — it is non-adherent, sterile if from a new roll, and allows visualization of the burn. Apply it as a single layer without wrapping circumferentially around a limb, as swelling may cause constriction.

Do not apply butter, oil, toothpaste, egg whites, or any home remedy to a burn. These practices persist in many cultures but trap heat, introduce bacteria, and delay healing. The WHO explicitly warns against these traditional remedies. Do not break blisters intact blisters. Blister fluid is sterile and provides a natural protective barrier against infection. If a blister breaks on its own, gently clean the area with mild soap and water and apply antibiotic ointment.

Chemical Burns: Special Considerations

Chemical burns require a different approach because the damaging agent continues to cause tissue destruction until it is fully removed. The American Red Cross advises that the most critical intervention is removing the chemical from contact with the skin as rapidly as possible.

Brush dry chemicals — such as powdered lime, phosphorus, or certain industrial agents — off the skin before adding water. Adding water to a dry chemical can create a caustic reaction that worsens the burn. Use a brush, cloth, or glove to gently remove visible powder.

Irrigate the affected area with copious amounts of cool running water for at least 20 minutes. The CDC recommends continuing irrigation for 60 minutes for strong alkali burns (such as drain cleaners, oven cleaners, or cement), as alkalis penetrate tissue deeply and continue destroying cells long after contact. Remove contaminated clothing, shoes, and jewelry while irrigating, taking care not to spread the chemical to unaffected skin.

For chemical burns to the eye, irrigate continuously with room-temperature water or sterile saline for at least 20 to 30 minutes. Hold the eyelid open and direct the stream from the inner corner of the eye outward. Remove contact lenses if present. Do not use eyewash cups that recirculate contaminated fluid. Call 911 or transport to an emergency department immediately after irrigation — chemical eye burns are true ophthalmological emergencies.

Contact the Poison Help line (800-222-1222) for chemical-specific guidance. Some chemicals — such as hydrofluoric acid, white phosphorus, and phenol — require specialized treatment beyond standard irrigation.

Electrical Burns: Hidden Dangers

Electrical burns are deceptive. The visible skin damage may be small — a single entry and exit wound — but the underlying tissue damage can be extensive due to heat generated as current travels through muscle, nerves, and blood vessels. The AHA emphasizes that electrical injuries can cause cardiac arrhythmias, muscle necrosis, renal failure from myoglobin release, and spinal cord injury.

The first priority is scene safety. Do not touch the person if they are still in contact with the electrical source. Turn off the power source at the main switch, circuit breaker, or fuse box. If that is not possible, use a non-conductive object — a wooden broom handle, rubber mat, or dry rope — to separate the person from the source. Do not use metal or wet objects.

Once the person is separated from the electrical source, check responsiveness, breathing, and pulse. The AHA warns that cardiac arrest can occur at the time of injury or develop later due to arrhythmias. Begin CPR immediately if the person is unresponsive and not breathing normally. Call 911.

For entry and exit wounds — which may be small, deep, and charred — cool the area with cool water and cover with sterile gauze. Do not apply ice or ointments. Electrical burn victims should be transported to a burn center or trauma center for evaluation, even if the visible injury appears minor. Internal tissue damage may not be apparent for hours.

When to Seek Emergency Care

The American Burn Association recommends that the following burns require medical evaluation: any burn in a child under 5 years or an adult over 60 years; burns involving the face, hands, feet, genitals, perineum, or major joints; burns that are circumferential (wrapping around an arm, leg, or torso); any third-degree burn regardless of size; second-degree burns larger than 3 inches (7.5 cm) in diameter; burns from chemicals, electricity, explosions, or high-pressure steam; burns in persons with pre-existing medical conditions (diabetes, heart disease, immunosuppression); and burns showing signs of infection (increasing redness, purulent drainage, fever, worsening pain).

For minor burns — first-degree or small second-degree burns that do not meet the above criteria — home management is appropriate. Clean the burn gently with mild soap and cool water, apply a thin layer of antibiotic ointment (bacitracin or silver sulfadiazine if prescribed), and cover with a non-stick dressing. Change the dressing daily. Monitor for infection. Over-the-counter pain medications such as ibuprofen or acetaminophen can manage discomfort.

Burn Recovery and Scar Management

After the burn heals, scar management is an important aspect of recovery. The Mayo Clinic recommends applying a moisturizing lotion or aloe vera gel to healed burns to keep the skin supple. Avoid direct sunlight on the healing burn for at least 12 months — use sun-protective clothing or a high-SPF sunscreen, as new skin is highly susceptible to hyperpigmentation.

For burns that heal with hypertrophic scarring or keloid formation, silicone gel sheets or silicone-based creams are the first-line treatment. Compression garments may be prescribed for larger burns. Physical therapy may be necessary for burns crossing joints to prevent contracture and preserve range of motion.

The psychological impact of burns should not be underestimated. The American Burn Association notes that burn survivors commonly experience post-traumatic stress disorder, depression, and body image concerns. Support groups and professional counseling are valuable resources.

FAQ

Should I put butter or toothpaste on a burn?
No. These home remedies trap heat, introduce bacteria, and delay healing. Cool running water for 10 to 20 minutes is the only scientifically supported first aid for thermal burns.

When should I pop a burn blister?
Never pop a blister intentionally. Intact blisters provide a sterile barrier against infection. If a blister breaks on its own, clean the area gently with mild soap and water, apply antibiotic ointment, and cover with a sterile dressing.

How long should I run cool water over a burn?
For thermal burns, cool running water for 10 to 20 minutes. For chemical burns, irrigate for at least 20 minutes — or 60 minutes for alkali chemicals. Cooling should begin within 30 minutes of injury for maximum benefit.

Do electrical burns always require medical attention?
Yes. Even small-looking electrical burns can mask extensive internal tissue damage and cardiac rhythm disturbances. Anyone who sustains an electrical shock with visible burns should be evaluated in an emergency department.

What is the best dressing for a minor burn at home?
A sterile, non-stick dressing secured with medical tape is ideal. Plastic wrap (cling film) is an excellent temporary option because it is non-adherent and sterile from a new roll. Avoid cotton balls or fluffy gauze that can adhere to the wound.

Internal links: For bleeding control when burns are accompanied by trauma, see wound care basics. For managing shock that may accompany severe burns, see shock treatment.