The time required to bear the swelling and pain for breastfeeding is related to the woman’s milk secretion, diet, and care, etc., and needs to be determined on a case-by-case basis. Due to the accumulation of milk during breastfeeding, many women will experience breast swelling and pain, which will gradually get better in 5-7 days. However, some women have less milk, so the duration of breast swelling and pain during the breastfeeding period will be shorter, and it is normal to feel no milk swelling within 24 hours. Some women have a good constitution, and their diet can meet the needs of lactation during breastfeeding, so they usually produce more milk. If you have obvious swelling and pain during breastfeeding and cannot be relieved, it is recommended that you go to the obstetrics and gynecology department or breast surgery department of a regular hospital as soon as possible to clarify the specific cause and then carry out targeted treatment under the guidance of a doctor.