Burns (Skin): Causes, Symptoms, Diagnosis, Treatment & Prevention

What is Burns (Skin)?

A burn is damage to the skin (and sometimes deeper tissues) caused by heat, chemicals, electricity, radiation, or friction. Burns are classified by depth and extent, ranging from first‑degree (superficial) injuries that affect only the outermost epidermis to third‑degree (full‑thickness) burns that destroy the entire skin and can involve muscle or bone. The degree of a burn determines the severity of pain, the risk of infection, and the appropriate treatment plan.

According to the Centers for Disease Control and Prevention (CDC), burns are one of the most common injuries in the United States, accounting for more than 400,000 emergency‑department visits each year. Prompt, appropriate care can dramatically reduce complications such as scarring, infection, and loss of function.

Common Causes

Burns can result from many everyday hazards. The most frequent causes include:

• Thermal burns – direct contact with hot liquids (scalds), flames, steam, or hot objects.
• Electrical burns – contact with household wiring, lightning, or high‑voltage equipment.
• Chemical burns – exposure to acidic or alkaline substances such as drain cleaners, batteries, or industrial solvents.
• Radiation burns – overexposure to ultraviolet (UV) light (sunburn) or therapeutic radiation.
• Friction burns – skin rubbing against a hard surface (e.g., road rash from a fall).
• Contact burns from hot surfaces – touching a stovetop, iron, or hot metal.
• Cold burns (frostbite) – prolonged exposure to extreme cold, though technically a thermal injury, often managed similarly.
• Burns from hot foods or beverages – especially common in children and the elderly.
• Industrial or workplace burns – accidents involving machinery, chemicals, or fire.
• Self‑inflicted or assault‑related burns – may involve chemicals, cigarettes, or incendiary devices.

Associated Symptoms

Burns are rarely isolated; they often present with other signs that help gauge severity:

• Pain that is sharp, burning, or throbbing (often absent in deep third‑degree burns).
• Redness (erythema) for superficial burns; white, leathery, or charred skin for deep burns.
• Blisters filled with clear fluid (first‑ and second‑degree) or blood‑tinged fluid (more severe).
• Swelling and edema surrounding the injury.
• Difficulty moving the affected area, especially when joints are involved.
• Systemic symptoms such as fever, chills, nausea, vomiting, or malaise – signs of infection or significant fluid loss.
• Signs of shock: rapid heartbeat, low blood pressure, pale or clammy skin, dizziness.
• Inhalation injury symptoms (cough, hoarseness, soot in the mouth) when burns are from fire.

When to See a Doctor

While minor first‑degree burns can often be managed at home, certain circumstances require professional evaluation:

• Burns covering more than 2% of the body surface area (BSA) in children or more than 5% BSA in adults.
• Any second‑ or third‑degree burn, regardless of size.
• Burns on the face, hands, feet, genitals, or over major joints.
• Blisters that are large, painful, or become infected (yellow/green discharge, increasing redness).
• Persistent pain that worsens after 24‑48 hours or does not improve with over‑the‑counter pain relief.
• Signs of infection: fever > 100.4 °F (38 °C), increasing redness, swelling, or pus.
• Electrical or chemical burns, even if they seem small, because damage may be deeper than it appears.
• Any burn accompanied by difficulty breathing, coughing up blood, or soot in the mouth.
• Non‑healing or worsening scars, especially after a burn that seemed minor at first.

Diagnosis

Medical evaluation of a burn involves a systematic approach:

1. History taking – mechanism of injury, time elapsed, first aid performed, medical history (diabetes, vascular disease, medications).
2. Physical examination – determination of burn depth (first, second, third degree), size (using the “Rule of Nines” or Lund‑Browder chart for children), and location.
3. Assessment of circulation – check capillary refill, pulse, and signs of compartment syndrome.
4. Laboratory tests (if indicated) – CBC, electrolytes, blood glucose, creatinine kinase for extensive burns; cultures if infection suspected.
5. Imaging – X‑ray or CT scan for suspected inhalation injury, foreign bodies, or deep tissue involvement; ultrasound may help assess fluid collections.
6. Specialist referral – severe burns are often managed by a multidisciplinary burn center team (plastic surgery, physical therapy, occupational therapy).

Treatment Options

Initial First‑Aid (Home Care)

• Cool the burn – Hold the area under cool (not ice‑cold) running water for 10‑20 minutes or apply a cool compress.
• Protect the skin – Pat dry and cover with a sterile, non‑stick dressing or clean cloth.
• Pain control – Over‑the‑counter analgesics such as acetaminophen or ibuprofen (follow dosing instructions).
• Avoid – Ice, butter, oils, or home remedies that can trap heat and increase infection risk.
• Hydration – Encourage fluid intake, especially for larger burns.

Medical Treatments

• Topical antimicrobial agents – Silver sulfadiazine, mafenide acetate, or newer nanocrystalline silver dressings to prevent infection.
• Advanced dressings – Hydrocolloid, silicone gel sheets, or bioengineered skin substitutes for partial‑thickness burns.
• Fluid resuscitation – For burns > 20% BSA, intravenous crystalloids (e.g., Lactated Ringer’s) using the Parkland formula.
• Analgesia – Prescription opioids or nerve blocks for severe pain; adjuncts such as gabapentin for neuropathic pain.
• Surgical intervention – Early excision and grafting for deep third‑degree burns, especially on functional areas.
• Tetanus prophylaxis – Administer tetanus toxoid if vaccination status is unknown or outdated.
• Physical therapy – Early range‑of‑motion exercises to prevent contractures.

Follow‑Up Care

Proper wound monitoring, scar management (silicone sheeting, pressure garments), and psychosocial support are essential components of long‑term recovery. Many burn centers provide multidisciplinary follow‑up to address functional and cosmetic outcomes.

Prevention Tips

Most burns are preventable with simple safety measures:

• Install and maintain working smoke detectors in every bedroom and on each level of the home.
• Keep a fire extinguisher in the kitchen and know how to use it.
• Never leave cooking food unattended; keep pot handles turned inward.
• Set water heater temperature at ≤ 120 °F (49 °C) to reduce scald risk.
• Use stove‑top guards, back burners, and keep children at least 30 cm (12 in) away from hot surfaces.
• Wear protective gloves and clothing when handling chemicals or hot tools.
• Apply sunscreen (SPF 30+) and wear protective clothing to prevent sunburn.
• When using electrical devices, inspect cords for damage and avoid overloading outlets.
• Educate children on “stop, drop, and roll” and safe play around fire.
• For people with diabetes or peripheral neuropathy, regularly inspect feet and hands for hidden burns.

Emergency Warning Signs

If any of the following occur, seek emergency care immediately (call 911 or go to the nearest emergency department):

• Severe pain that does not improve with strong analgesics.
• Burns covering large areas: > 5% of adult BSA or > 2% of child BSA.
• Third‑degree (charred, white, or leathery) burns.
• Burns on the face, hands, feet, genitalia, or over major joints.
• Signs of inhalation injury: difficulty breathing, hoarseness, soot in the mouth or nose.
• Rapid heartbeat, low blood pressure, dizziness, or fainting (possible shock).
• Severe swelling that impairs circulation or causes numbness.
• Signs of infection: spreading redness, warmth, pus, or fever.
• Electrical or chemical burns, even if the surface looks small.

Key Take‑aways

Burns are a common but potentially serious injury. Prompt first‑aid, appropriate medical evaluation, and diligent follow‑up can prevent complications such as infection, scarring, and functional loss. Understanding the causes, recognizing warning signs, and employing preventive strategies are essential for protecting yourself and your loved ones.

References:
1. Mayo Clinic. “Burns.” https://www.mayoclinic.org.
2. CDC. “Burn Prevention.” https://www.cdc.gov.
3. NIH National Library of Medicine. “Burns: Diagnosis and Treatment.” https://www.ncbi.nlm.nih.gov.
4. WHO. “Burns.” https://www.who.int.
5. Cleveland Clinic. “Burn Care: What to Expect.” https://my.clevelandclinic.org.