Cortes
Lacerations
Revisado por pares por Dr Rosalyn Adleman, MRCGPÚltima actualización por Dr Doug McKechnie, MRCGPLast updated 5 Mar 2025
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This leaflet gives a guide as to what you should do following a cut.
En este artículo:
Video picks for Primeros auxilios
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.
First aid for cuts
Volver al contenidoPress 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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Do I need medical attention?
Volver al contenidoMany 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.
Cut infection symptoms
Volver al contenidoCuts 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.
Patient picks for Primeros auxilios

Tratamiento y medicación
Cómo tratar con un adulto que no responde
Este folleto se ha creado a partir de los consejos de primeros auxilios proporcionados por St John Ambulance, la principal organización benéfica de primeros auxilios del país. Si alguien se vuelve inconsciente, necesita a alguien que le ayude a mantenerse seguro y prevenir más daños. El tipo de ayuda que necesitan varía dependiendo de por qué se han vuelto inconscientes, si están respirando o no, y si son un bebé, un niño o un adulto.
por el Dr. Colin Tidy, MRCGP

Tratamiento y medicación
Manejar a un niño que no responde
If someone becomes unresponsive they need someone to help keep them safe and prevent further harm. The type of help they need varies depending on why they have become unresponsive, whether they are breathing or not breathing and if they are a baby, child or adult.
por la Dra. Philippa Vincent, MRCGP
Lecturas adicionales y referencias
- Cuts and Grazes; St John's Ambulance
- Lacerations; NICE CKS, diciembre 2022 (acceso solo en el Reino Unido)
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Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Próxima revisión: 4 Mar 2028
5 Mar 2025 | Última versión

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