Common Symptoms of Granulomatous Mastitis

GM is uncomfortable in specific, recognizable ways. Knowing what's typical vs. what needs urgent attention helps you advocate for the right imaging and the right timeline.

Common symptoms

• Firm breast mass or lump — often tender, sometimes fixed to the skin.
• Breast pain — deep, burning, or throbbing; sometimes worse before a period.
• Skin redness and warmth — can look like mastitis or cellulitis.
• Swelling that changes the shape of the breast.
• Abscesses or drainage — pockets that soften and open through the skin.
• Nipple retraction or skin dimpling — a common reason GM is mistaken for cancer.
• Fistulas or sinus tracts — chronic openings that heal and reopen.

When to call your physician the same day

• Fever over 101°F (38.3°C) with breast redness or drainage.
• Rapid spreading redness — hours, not days.
• Severe, unrelenting pain that is new or different.
• Confusion, faintness, or feeling systemically unwell.

If in doubt, be seen. GM can co-exist with a bacterial infection that needs immediate antibiotics, and physicians would rather see you and be reassured than miss it.

Symptoms are not stages

You may have all of these, one of these, or the picture may shift week to week. GM is famously inconsistent — that unpredictability is part of what makes it so hard, and it is not your fault.