The treatment of lumps during breastfeeding is as follows: 1. sudden breast lumps during breastfeeding: due to inflammation of the milk ducts or folding of the milk ducts leading to poor milk discharge, the accumulated milk can be discharged by manipulation; 2. local lumps with systemic fever: the content of bacteria and toxins in local tissues is high, and hand squeezing can cause toxins to enter the blood, leading to toxemia or bacteraemia, so patients with local lumps combined with systemic symptoms should not discharge the milk; 3. local lumps with abscess formation: the patient’s milk ducts are occluded, and other treatment methods are appropriate.