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A breast abscess is a painful build-up of pus in the breast caused by an infection. It mainly affects women who are breastfeeding. It's not usually serious, but it needs treatment in hospital.

Symptoms of a breast abscess may include:

• a lump or swelling in your breast
• pain in your breast, it may also feel warm or look red (this may be harder to see on brown or black skin)
• a high temperature
• feeling generally unwell

You’re more likely to have a breast abscess if you have recently had a breast infection (mastitis) or if you’ve had a breast abscess before.

Ask for an urgent GP appointment or get help from NHS 111 if you have:

If the GP thinks you have a breast abscess, they will refer you to hospital for an ultrasound scan of your breast to check for an abscess.

The GP may give you antibiotics first if they think you have a breast infection.

Important

Go back to the GP if your symptoms do not start to improve within 2 days of starting antibiotics.

You’ll need to go to hospital to have treatment for a breast abscess.

Treatment involves the pus being drained from the abscess with either:

• a needle – this might need to be done a few times and you may have to go back to hospital each time
• a small cut in your skin

You'll be given a local anaesthetic before the pus is drained so you do not feel any pain. You can usually go home the same day and may be given antibiotics to take at home.

The abscess should heal completely in a few days or weeks.

A breast abscess can form if you have a breast infection (called mastitis) and it's not treated quickly.

You're more likely to get mastitis if you are breastfeeding. You can get it if you're not breastfeeding, but this is less common.

Getting treatment for mastitis as soon as possible can help reduce the risk of getting an abscess.