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Cortes

Lacerations

This leaflet gives a guide as to what you should do following a cut.

At a glance

  • A cut or laceration is a break in the skin often caused by a sharp object or blunt impact.

  • To treat a cut, stop the bleeding, clean the wound with tap water, and cover it with a sterile dressing.

  • Seek medical help for deep, large, dirty, or gaping wounds, or if bleeding does not stop soon.

  • You may need a tetanus booster if your immunisations are not up to date.

  • See a doctor for increased pain, swelling, redness, discharge, or a foul smell from the wound.

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Cuts, lacerations, and grazes are all types of skin wound. A skin wound is a break or damage in the skin.

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What is a laceration?

Sometimes doctors use the word 'laceration' to mean a deep tear of the skin with jagged or irregular edges, usually caused by a blunt impact such as a fall.

The word 'cut' can be used to mean a skin wound caused by a sharp object, with clean, straight edges.

Often, though, people just use 'cut' and 'laceration' interchangeably to describe any wound that breaks the skin.

  • Press firmly on the wound to stop the bleeding.

  • Obtain medical attention if the bleeding is heavy or does not stop soon.

  • Clean the wound no matter how small it is. Cleaning will reduce the chance of infection. Just use ordinary tap water. Some antiseptics may damage skin tissue and delay healing.

  • After cleaning, cover the wound with a sterile, non-sticky dressing.

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Many people deal with minor cuts by themselves. The following gives a guide as to when to consider getting medical help.

  • Ideally, a doctor or nurse should clean wounds that are large, deep or dirty, and abrasions caused by gravel. There is a risk of infection and also a risk of permanent tattooing of the skin from gravel or dirt which remains in a wound.

  • Wounds longer than 5 cm or which involve deeper tissues than the skin may need stitches.

  • If part of the wound has dead or damaged skin then this may need to be trimmed or removed to prevent infection developing in it.

  • If you suspect the cut has damaged deeper tissues such as nerves, tendons, or joints.

  • Wounds caused by penetrating glass, metal, etc, may need to be carefully examined and may need an radiografía to check that there is nothing left inside.

  • Gaping wounds should be closed with stitches, glue, or sticky tape. Even small gaping wounds on the face are best dealt with by a doctor to keep scarring to a minimum. Most wounds are closed straightaway. However, a doctor may advise waiting for a few days before closing certain wounds. For example, if the wound is more than six hours old, if it is infected, or if it is at high risk of becoming infected, such as a wound contaminated with manure. This delayed closure aims to make sure the wound is not infected before closing it up.

  • You should have a tetanus booster if you are not up to date with your immunisations.

  • Antibiotic medicines are not needed in most cases. However, a course of antibiotics may be advised in some situations where there is a high risk of a wound infection developing. These include:

    • Wounds to the feet - especially if you have poor circulation to the feet.

    • Wounds with jagged edges.

    • Wounds contaminated with soil, manure or stools (faeces).

    • Deep puncture wounds.

    • Wounds in older people.

    • Wounds caused by animal or human bites.

    • If your resistance to infection is low. Examples include:

      • If you are on chemotherapy or taking steroid tablets.

      • If you have no working spleen.

      • If you have diabetes.

      • If you have alcohol dependence.

      • If you have HIV/AIDS.

Nota: for more information on bites, see separate leaflets called Mordeduras de perros y gatos y Mordeduras humanas.

Cuts can become infected.

See a doctor if the skin surrounding a wound becomes:

  • More tender.

  • Doloroso.

  • Swollen.

  • Red or inflamed over the following few days.

  • Foul-smelling.

You should also see a doctor if fluid (pus) is coming out of the wound.

In some cases, as the wound heals, the colour in the skin darkens around the scar. This change in skin colour is called hyperpigmentation. This may be prevented if you use high-factor sunscreen regularly for 6-12 months on healing wounds that are exposed to sunshine.

Preguntas frecuentes

What is the primary difference between a 'cut' and a 'laceration'?

While people often use 'cut' and 'laceration' interchangeably, there's a distinction. A 'cut' typically refers to a wound with clean, straight edges caused by a sharp object. A 'laceration', on the other hand, usually describes a deeper tear with jagged edges, often resulting from a blunt impact like a fall.

Is it always necessary to use antiseptic on a cut to prevent infection?

No, it is not always necessary. The article states that you should use ordinary tap water to clean the wound. Some antiseptics may actually damage skin tissue and delay healing. Cleaning with tap water is effective in reducing the chance of infection.

When should I be concerned about scarring, especially on my face?

If you have even small gaping wounds on your face, it is best to have a doctor examine them. This is primarily to help minimise scarring.

Can I get an X-ray for a wound to check if anything is left inside?

Yes, if your wound was caused by penetrating glass, metal, or similar objects, a doctor may need to carefully examine it and might order an X-ray. This is to ensure that no foreign material remains inside the wound.

If my wound is more than six hours old or looks dirty, will a doctor still stitch it?

In some cases, if a wound is more than six hours old, or if it is infected or at high risk of becoming infected (for example, if contaminated with manure), a doctor might advise waiting a few days before closing it. This approach, called delayed closure, helps ensure the wound is not infected before it is stitched up or closed.

What is hyperpigmentation and how can I prevent it on a healing wound?

Hyperpigmentation is when the skin around a healing scar darkens in colour. To help prevent this, especially on wounds exposed to sunshine, you should regularly use high-factor sunscreen for 6-12 months on the healing area.

Lecturas adicionales y referencias

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About the authorView full bio

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Dr Doug McKechnie, MRCGP

Medical Writer

MA, MBBS, MSc, DRCOG, MRCP(UK), MRCGP(2021), FHEA

Dr Doug McKechnie is an NHS GP working in London. He works full-time clinically and is also the Deputy Lead for the Clinical and Professional Practice module at University College London Medical School.

About the reviewerView full bio

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Dr Rosalyn Adleman, MRCGP

MRCGP

Dr Rosalyn Adleman, is an NHS GP working in north London.

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