It is necessary to discharge residual milk after weaning. At the end of lactation, you should return to milk after weaning your child. Usually you need to take oral milk-returning treasure, or a lot of vitamin b6 and malt foods, you can choose to boil malt water. There will be milk stasis after weaning. Patients can use a breast pump to suck out the accumulated milk in time, and then wear a suitable bra to avoid mastitis caused by swelling and squeezing of milk. Mastitis usually manifests as local redness, swelling and heat pain, which requires anti-inflammatory treatment.