What to Do If You Get a Burn: First Aid and When to See a Doctor

2026-04-23

First, Cool the Burn Under Running Water

Burns can happen from everyday items — hot water, cooking oil, irons, heaters, hot water bottles (yutanpo), and disposable pocket warmers (kairo). In medicine, burns are evaluated by three factors: depth, size, and location. Even a burn that looks minor at first can develop worsening redness, pain, or blisters hours later.

If you get a burn, follow these steps right away:

Move away from the heat source.
Cool the burned area under running tap water for 5 to 30 minutes — about 20 minutes is ideal for most small burns.
Do not apply ice or a cold pack directly to the skin. This can damage the tissue further.
If hot water or oil has soaked through your clothing, do not try to pull the clothes off. Pour water over the clothing instead.
Remove rings, watches, belts, and tight items from the area before it starts to swell.

A note for children and older adults: cooling a large area for a long time can lower body temperature too much. Keep the rest of the body warm with a blanket while cooling only the burned area.

When Should You See a Doctor?

A small burn with only redness and mild stinging can often heal on its own. However, you should see a doctor if any of the following apply:

There are blisters.
The pain is severe.
The skin looks white or black, or you feel little or no pain in the burned area.
The burn is larger than the palm of your hand.
The burn is on the face, hands, feet, joints, or genitals.

Seek care early if the person is a young child, an elderly adult, or someone with a chronic illness such as diabetes.

Be especially careful with low-temperature burns from hot water bottles or pocket warmers. The skin may look only slightly red on the surface, but the damage underneath can be surprisingly deep.

You should also see a doctor if, after cooling:

The pain continues.
Redness or swelling spreads.
Pus appears.
The burn does not improve after several days.

What not to do

Do not break blisters yourself. They protect the skin underneath while it heals.
Do not apply oil, butter, toothpaste, or other home remedies to the burn.
Do not use strong disinfectants.
Until you see a doctor, cover the burn loosely with clean gauze or a clean cloth.

Call an ambulance or go to the emergency room immediately if:

You have inhaled smoke or are having trouble breathing.
The burn is on your face or around your mouth.
It is a chemical or electrical burn.
A large area of the body is burned.

In Japan, you can call 119 for an ambulance.

Treatment at the Clinic or Hospital

At the clinic, a doctor will check the depth and size of the burn. Depending on the case, treatment may include:

Cleaning the wound
Pain relief medication
Ointments
Wound dressings — medical pads or sheets that protect the burn while keeping it moist (modern burn care avoids drying the wound out)
Tetanus prevention, if needed

Deep burns, or burns in sensitive areas such as the face or hands, may require care at a specialist facility or, in some cases, surgery.

Please do not tough it out thinking, “It’s not that bad.” If you are unsure, it is always safer to have a doctor check the burn early.

If you are visiting Osaka and need medical care for a burn or injury, International Clinic Osaka Shinsaibashi (ICOS) provides same-day, English-speaking care for international travelers. We are located on the 4th floor of the Zenith Building, 1-13-25 NishiShinsaibashi, Chuo-ku, Osaka.

Phone: +81-6-6484-6392

Email: c.icos@international-clinic-osaka.com