Sunburn and Burns: How to Treat Them and When to Seek Medical Help

Introduction

Sunburn and thermal burns (scalds and contact burns) are among the most common skin injuries encountered in daily life. While minor burns can often be managed at home, more serious burns require prompt medical attention to prevent infection, scarring, and systemic complications.

This guide explains how to classify burn severity, what to do — and what not to do — in the first critical minutes after a burn, and when to seek emergency care.

Understanding Burn Severity

Burns are classified by depth of tissue damage:

Sunburn is almost always a first-degree burn, occasionally progressing to superficial second-degree in severe cases (blistering sunburn).

Part 1: Treating Sunburn

What Is Sunburn?

Sunburn is an inflammatory skin reaction caused by overexposure to ultraviolet (UV) radiation — primarily UVB rays from the sun or artificial sources such as tanning beds. Symptoms typically appear 2–6 hours after exposure and peak at 12–24 hours.

Symptoms

• Red, warm, tender skin
• Pain and sensitivity to touch
• Swelling
• Blistering (in severe cases)
• Peeling skin after 3–5 days as the skin heals
• Systemic symptoms in severe cases: fever, chills, headache, nausea, dizziness ("sun poisoning")

Immediate First Aid for Sunburn

1. Get out of the sun immediately and move to a cool, shaded environment.
2. Cool the skin: Apply cool (not cold or iced) water compresses or take a cool shower for 10–15 minutes. Do not use ice directly on sunburned skin.
3. Hydrate: Drink plenty of water and electrolyte fluids — sunburn draws fluid to the skin surface and can cause dehydration.
4. Moisturize: Apply a gentle, fragrance-free moisturizer or aloe vera gel to soothe the skin. Avoid petroleum-based products (e.g., Vaseline) in the acute phase as they trap heat.
5. Pain relief: Take over-the-counter ibuprofen or aspirin to reduce inflammation and pain. Avoid aspirin in children.
6. Do not pop blisters: Blisters protect against infection. If they break naturally, clean gently with mild soap and water and apply antibiotic ointment.
7. Protect the skin: Cover sunburned areas with loose, soft clothing when going outdoors. Apply SPF 30+ sunscreen once the skin has healed.

What to Avoid

• Ice or ice water directly on skin (causes vasoconstriction and can worsen tissue damage)
• Butter, oil, or toothpaste (trap heat and increase infection risk)
• Alcohol-based products (dry and irritate the skin)
• Tight or synthetic clothing over burned areas
• Further sun exposure until fully healed

When to Seek Medical Attention for Sunburn

• Blistering over a large area of the body
• Fever above 38.5°C, severe headache, confusion, or vomiting (signs of heat stroke or sun poisoning)
• Sunburn in infants or young children
• Signs of infection: increasing pain, swelling, pus, or red streaking from the burn
• Eye pain or vision changes after sun exposure (photokeratitis)

Part 2: Treating Thermal Burns (Scalds and Contact Burns)

Common Causes

• Hot liquids (scalds from boiling water, hot beverages, steam)
• Contact with hot surfaces (stoves, irons, hot metal)
• Fire or flame
• Chemical burns (acids, alkalis)
• Electrical burns

Immediate First Aid for Thermal Burns

1. Remove from the heat source immediately. For clothing on fire: stop, drop, and roll. Remove burning or hot clothing and jewelry near the burn — but do not remove clothing stuck to the skin.
2. Cool the burn with cool running water for 20 minutes. This is the single most important first aid step. Start within 3 hours of the burn for maximum benefit. Use cool tap water — not ice, ice water, or cold packs.
3. Cover the burn loosely with a clean, non-fluffy material — cling film (plastic wrap) is ideal as it is sterile, non-adherent, and allows assessment. Alternatively use a clean plastic bag for hand burns. Do not use cotton wool or fluffy bandages.
4. Pain relief: Take ibuprofen or paracetamol as directed.
5. Keep the patient warm: Cooling the burn can lower body temperature. Cover the rest of the body with a blanket.
6. Do not pop blisters.
7. Seek medical attention for anything beyond a minor first-degree burn.

What to Avoid

• Ice or ice water (causes frostbite and worsens tissue damage)
• Butter, oil, toothpaste, or any home remedies (increase infection risk and trap heat)
• Bursting blisters
• Removing clothing or material stuck to the burn
• Applying adhesive bandages directly to the burn

When to Seek Emergency Medical Care

Go to the emergency department or call emergency services immediately if:

• The burn is second-degree and larger than 5 cm, or covers the hands, feet, face, groin, buttocks, or a major joint
• The burn is third-degree or fourth-degree (any size)
• The burn was caused by chemicals or electricity
• The burn involves the airway (inhalation injury): hoarseness, difficulty breathing, singed nasal hairs, or soot in the mouth/nose after a fire
• The patient is an infant, young child, or elderly person
• The burn encircles a limb (circumferential burn — risk of compartment syndrome)
• Signs of infection: increasing redness, swelling, pus, fever, or red streaking
• The patient shows signs of shock: pale, cold, clammy skin; rapid weak pulse; confusion; loss of consciousness

Burns in Children: Special Considerations

Children have thinner skin than adults, meaning burns penetrate more deeply and are more serious at the same temperature and duration of exposure. Scalds from hot liquids are the most common burn injury in young children.

• Any burn in a child under 5 years should be evaluated by a doctor
• Cool with running water for 20 minutes — then keep the child warm to prevent hypothermia
• Do not use ice, butter, or any home remedies
• Seek emergency care for any burn larger than the child's palm

Long-Term Care and Scar Prevention

For burns that heal without surgery (first and superficial second-degree):

• Keep the area moisturized with a fragrance-free emollient as the skin heals
• Apply SPF 50+ sunscreen to healed burn areas for at least 12 months — new skin is highly sensitive to UV damage and hyperpigmentation
• Silicone gel sheets or silicone gel can help reduce scar formation when applied to healed burns
• Avoid scratching peeling skin
• For deeper burns, a plastic surgeon or burn specialist can advise on scar management, compression therapy, or surgical options

Expert Burn and Dermatology Care in Shanghai

Shanghai's leading hospitals are well-equipped to manage burns of all severities. For emergency burn care, Ruijin Hospital and Changhai Hospital have experienced burn units. For outpatient dermatology and scar management, Huashan Hospital and Zhongshan Hospital offer specialist consultations.

China Medical Concierge Shanghai (CMCS) helps international patients access the right specialist quickly — whether for emergency coordination, follow-up burn care, or scar revision consultations — with full medical translation and appointment support.

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