What should you know about subacute mastitis?

Mastitis can involve inflammation in breast tissue during breastfeeding. A subacute pattern may feel like a persistent tender area, fullness, burning, or a change in how milk flows rather than a sudden, dramatic illness. Nipple damage, an overly full breast, shallow attachment, or repeated pressure can contribute. Breast pain and painful breastfeeding can have several causes, so the pattern, examination, and feeding history matter. A firm area that is not settling may need assessment for a collection or another breast problem.

Continue breastfeeding or expressing in a comfortable, gentle way unless a clinician advises otherwise; abruptly stopping can increase fullness. Check attachment and positioning, vary feeding positions, and avoid deep massage or forceful squeezing of the breast. Rest, drink to thirst, and use a cool pack wrapped in cloth for swelling. A lactation consultation can help identify milk-transfer or positioning problems. Ask a clinician about pain relief and antibiotics rather than using medicines left from an earlier illness.

Contact a clinician promptly if symptoms are not improving, recur, or include fever, chills, rapidly spreading redness, worsening pain, pus, or a soft fluid-filled area. Seek urgent care if you feel severely unwell, faint, or confused. A persistent lump or inflammation after treatment also needs review. Breast inflammation during breastfeeding should not be judged by pain alone; lack of improvement is a reason to reassess the diagnosis and treatment.

Could this be mastitis, a blocked area, or an abscess? Is my feeding technique contributing? Should I continue feeding from the affected side? What signs would mean I need imaging or a different treatment?