Mastitis is inflammation of the breast or udder, usually associated with breastfeeding. Symptoms typically include local pain and redness. There is often an associated fever and general soreness. Onset is typically fairly rapid and usually occurs within the first few months of delivery.Complications can include abscessformation. Symptoms: Localized breast pain and redness, fever Breast tenderness or warmth to the touch General malaise or feeling ill Swelling of the breast Pain or a burning sensation continuously or while breast-feeding Skin redness, often in a wedge-shaped pattern Fever of 101 F (38.3 C) or greater The affected breast can then start to appear lumpy and red. Some women may also experience flu-like symptoms such as: Aches Shivering and chills Feeling anxious or stressed Fatigue Differential diagnosis: Plugged milk duct,breast engorgement,breast cancer (rare) Prevention: Frequent breastfeedingwith good technique