Breast swelling and pain during weaning is caused by the accumulation of breast milk, which can be treated in the following ways: 1. Use hot towels to apply hot compresses to the swollen and painful parts of the breast, which can play a role in accelerating blood circulation and also try to relieve the breasts, which are lumpy because of swelling and pain, and play a role in activating blood to relieve the symptoms of breast swelling and pain. 2. While applying hot compresses, you should also pay attention to your diet and try to avoid eating If you have a breast lump, you should do more pressing.