Infected cut

How to tell if a cut is infected

Key points about how to tell if a cut is infected

  • It’s common to cut, scrape or graze your skin.
  • While most minor wounds heal themselves, some don’t.
  • If a wound gets infected, it can lead to complications and, in some cases, be life-threatening.
  • You may be prescribed an antiseptic cream or a course of antibiotics for an infected wound.
  • Here are some common signs of a wound infection.
Closeup of boy's grazed knee
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Here are some signs that a wound may have become infected. If you have a surgical wound (a cut in your skin due to having had surgery) you can find out more about what to look out for on the surgical wounds page

It's not always easy to tell, so if you have any doubts, or show any of the signs below, talk to a healthcare provider. 

Infected cut on thumb


Image credit: Depositphotos (amended)


Swelling

It’s normal to see some swelling around a wound when it first happens. However, if the swelling gets worse or doesn’t go down, it could be a sign of infection.


Redness

A wound can be a bit red for a few days after the injury has occurred, but if the redness continues it may be infected.


Red streak

If you notice red streaks around the wound or a red streak spreading outwards from the wound, seek medical attention straight away. This is a sign of an infection that could be life-threatening.


Pus

If the wound is oozing pus or any other discoloured substance, it’s infected. If there's also a nasty smell, that is a sign to get it seen by a doctor or nurse.


Fever/heat

If you develop a fever (high temperature) it could mean your wound is infected. Also, although it’s normal for the skin surrounding a wound to feel warm, if it doesn’t cool down or if it gets hotter, this is also a sign that it could be infected.


Feeling unwell

If you’re feeling generally unwell, tired or not yourself, it could mean you’re fighting an infection. Nausea or diarrhoea can be further signs of an infection.


Pain

It’s normal for a wound to hurt at first, and then for the pain to gradually disappear. However, if the pain stays the same or gets worse it could be a sign of infection.


Restricted movement

You may initially find it hard to move the wounded area because of pain or swelling. But if you continue to be unable to move it, or you get any loss of feeling or numbness, then it may be infected.

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