Mastitis is categorized into breastfeeding mastitis and non-breastfeeding mastitis. The main causes of breastfeeding mastitis are the accumulation of milk and bacterial invasion, and milk blockage is an important factor causing the accumulation of milk. Breastfeeding mastitis can be caused by too much milk or too little suckling by the baby, resulting in the inability to empty the excess milk in a timely manner, resulting in a buildup of milk, blockage of the milk ducts, and disruption of milk drainage, causing the patient to experience the symptoms of breastfeeding blockage. The symptoms of mastitis vary greatly depending on the type. Mastitis is often acute, with an infectious inflammatory response, mostly redness, swelling, heat, pain and other symptoms; non-lactating mastitis is often chronic, with a non-infectious inflammatory response, mostly breast lumps, abscesses, nipple inversion and other symptoms, sinus tracts can be formed, and recurrent episodes and other characteristics. If you are diagnosed with mastitis, you should standardize your treatment under the guidance of your doctor.