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Mastitis

Find out about mastitis, including what the symptoms are, how to treat it and why it happens.

About this information

This NHS content is written for people in England. Services, entitlements and contact routes may differ in other countries.

Symptoms of mastitis

Mastitis usually only affects 1 breast, and symptoms often come on quickly. They include:

  • a swollen area on your breast that may feel hot and painful to touch – the area may become red but this can be harder to see if you have black or brown skin
  • a wedge-shaped breast lump or a hard area on your breast
  • a burning pain in your breast that might be constant or only when you breastfeed
  • nipple discharge, which may be white or contain streaks of blood

You may also get flu-like symptoms, such as aches, a high temperature (or feeling hot, cold or shivery) and tiredness.

Things you can do to ease mastitis

Do

  • if you are breastfeeding, continue to breastfeed your baby when they want and for as long as they want. You can also offer your baby a breastfeed if your breasts are uncomfortably full

  • hand express enough breast milk to feed your baby if breastfeeding is too painful, or if your baby does not want to feed from your affected breast

  • when breastfeeding make sure your baby is positioned and attached properly. Your midwife, health visitor or a breastfeeding specialist can advise you.

  • breast pain may be soothed by applying a cold compress (for example a cloth soaked in cold water) to the affected breast for 10 minutes every hour

  • take paracetamol or ibuprofen to reduce any pain or high temperature

  • rest

  • wear a comfortable and supportive bra

Don't

  • do not wear tight-fitting clothing or bras until you feel better

  • do not take aspirin

  • do not express more milk than your baby needs

  • do not apply firm pressure to the breast - any pressure should be gentle

  • do not stop breastfeeding suddenly –  find out how to stop breastfeeding

  • do not apply oils, soaks or creams to your breast

See a GP if:

  • your symptoms do not get better 12 to 24 hours after treating it at home
  • your symptoms do not get better 48 hours after taking antibiotics
  • you get mastitis and you are not breastfeeding

Treatment for mastitis from a GP

A GP will usually prescribe antibiotics if you have mastitis and your symptoms are not getting better.

If you're breastfeeding a very small amount of the antibiotic may go into your breast milk. There is no risk to your baby, but it might make them irritable and restless.

What to do if mastitis comes back

If you are breastfeeding and keep getting mastitis, it might be due to problems with positioning and attaching.

If you have any breastfeeding problems, it's important to ask for help from a midwife, health visitor or a breastfeeding specialist as soon as possible.

Causes of mastitis

Mastitis is common in breastfeeding women as it can be caused by a build-up of milk.

Women who are not breastfeeding can also get mastitis, as can men. This can be caused by:

  • smoking – toxins found in tobacco can damage breast tissue
  • damage to the nipple, such as a piercing or skin condition such as eczema
  • having a breast implant
  • having a weakened immune system due to a health condition such as diabetes
  • shaving or plucking hairs from around your nipples

Mastitis

Symptoms

Mastitis

Self-care

Mastitis

Medical treatments

Mastitis

Causes

Symptoms of mastitis include a swollen, hot or painful breast, a wedge-shaped lump or hard area on your breast, and nipple discharge.

You may be able to help ease mastitis symptoms by resting, drinking fluids, taking painkillers and continuing to breastfeed (if you’re breastfeeding).

If mastitis does not get better on its own, a GP will usually prescribe antibiotics.

In women who are breastfeeding, mastitis is often caused by a build-up of milk. Other causes include smoking or damage to the nipple.

Content supplied by the NHS website

Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

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