How long does it take for a nipple to form a callus?

Patient's question:

No

Doctor's answer:

Using massage techniques, the breasts are massaged to ensure all milk is fully expressed. After the milk is completely drained, erythromycin ointment is applied to the nipple to promote recovery. After several days of treatment, relief can be achieved until full recovery, which is a good method. Never use a breast pump again.