Ice or Toothpaste on a Hot-Water Burn? What to Do Instead

Short answer: Do not put ice or toothpaste on a hot-water scald. Move away from the heat and start cooling the affected skin with cool running tap water. Korea’s KDCA advises at least 20 minutes; NHS guidance uses 20 minutes. Cooling does not mean freezing the skin, and it must not delay an emergency call or transport for a serious burn.

What this answer covers

This is immediate first aid for a thermal burn from hot water, drinks or steam. It is not a home-treatment plan for chemical, electrical or eye injuries, or a large or deep burn. Pain alone does not establish depth: serious nerve damage can make a deep burn hurt less.

Why not ice or toothpaste?

The American Red Cross warns that ice can further damage skin. NHS specialist burn services advise against ice, butter, creams and pastes such as toothpaste during initial first aid. They do not replace water cooling and can interfere with examination. A product feeling cool is not evidence that it is appropriate for damaged skin.

A practical first-aid sequence

Stop the exposure. Move away from the hot liquid or object. Remove nearby clothing, watches and rings before swelling, but leave anything stuck to the skin in place.
Cool the affected area. Use cool running water for 20 minutes as soon as possible. KDCA says at least 20 minutes; the NHS says 20 minutes and recommends starting within three hours. That window is not a reason to wait.
Keep the rest of the person warm. Use clothing or a blanket on uninjured areas. Do not put a child in a cold bath. If a child starts shivering, stop cooling and obtain medical help.
Cover loosely after cooling. Use a clean non-adherent dressing. Do not burst blisters or put an adhesive surface on the wound. UK guidance also describes loose cling film as temporary protection: lay it over the cooled burn, never wrap it tightly around a limb or place it on the face.

Do not delay cooling while choosing an ointment or scar product. Later wound care depends on the injury; it is a separate decision from immediate first aid.

When cooling is not enough

Breathing difficulty, altered consciousness, suspected smoke inhalation, or a very large or deep burn needs emergency assistance. Call 119 in South Korea or the local emergency number elsewhere. Report facial, mouth or neck burns, a hoarse voice or soot in sputum. Chemical and electrical burns require assessment even when the surface injury looks small.

White or charred skin, reduced sensation, blistering or skin loss, and injuries to the hands, feet, joints or genitals warrant prompt medical assessment. Seek early advice for infants, older adults and people with relevant medical conditions. Increasing pain, spreading redness or swelling, pus or fever also calls for reassessment. First aid does not determine that a burn can safely stay at home.

Applying Korean and overseas guidance

KDCA and the NHS both prioritize prompt running-water cooling. This article uses the 20-minute approach consistent with Korean advice rather than combining different agencies’ wording to shorten it. UK numbers 999 and 111 are not Korean services. Use emergency and clinical services where you are; follow responders’ instructions when transport and cooling must be coordinated.

What to record and ask

Note the injury time and source, body site, when cooling began and for how long, any substance applied, and changes in blisters, sensation or breathing. Do not postpone cooling or a call to take photographs.

Does the depth or location require specialist burn care or dressings?
How should I protect the wound, and when should it be checked again?
Which changes mean I should return before the planned review?

Sources and review date

Warning signs and assessment: NIH/NLM MedlinePlus: Burns.

Reviewed October 20, 2026. General first-aid information based on public official guidance; not an individual burn examination, diagnosis or treatment plan. No clinician-review claim is made.