Causes of non-lactational mastitis

Bacteria can enter through cracked or irritated skin. Smoking is associated with inflammation and blockage of ducts near the nipple, while nipple piercings, eczema, diabetes or reduced immune defences can make infection easier to develop. Sometimes no single cause is found.

Inflamed tissue may become warm, swollen, red or tender. If pus collects, an abscess can form and may feel like a painful lump. Inflammation centred beneath the nipple can recur or create a small draining opening near the areola.

These changes can resemble other breast problems, so examination matters. A clinician may arrange ultrasound when an abscess is suspected or when a lump does not settle. Persistent skin or nipple changes may require further breast assessment rather than repeated treatment without a clear diagnosis.

Arrange a clinical review, particularly if this is a first episode. Do not squeeze or attempt to drain a lump. A supportive bra, a wrapped cool pack and a pain reliever that is suitable for you may ease discomfort while you await care.

Treatment depends on the cause and may include antibiotics or drainage of an abscess. If episodes return, tell the clinician about smoking, piercings, skin conditions, diabetes, medicines and previous breast procedures because these details can guide investigation and prevention.

Seek same-day medical advice for rapidly increasing redness or swelling, fever, chills, feeling very unwell, pus, or a painful swelling that may be an abscess. Prompt review is also appropriate if you have diabetes or weakened immunity.

Book reassessment if symptoms do not improve with prescribed treatment, keep returning, or leave a persistent lump, nipple inversion, discharge or skin change. These features need evaluation even when pain is mild.

Ask whether there is evidence of an abscess, whether imaging is appropriate, how long improvement should take, and what to do if inflammation returns. You can also ask whether a medicine, skin disorder or duct problem may be contributing.