What causes sharp, needle-like pain in the breasts during breastfeeding?

Oct 25, 2022 Source: Cainiu Health
Disease description:

The baby has been breastfed since birth, but for the past two days I've noticed a sharp, needle-like pain in my breasts. What could be causing this?

Doctor's answer (1)
Dr. Li Qiang
A sharp, needle-like pain in the breast during breastfeeding may be caused by the baby's strong sucking force combined with sensitive nipples, leading to discomfort from intense stimulation. It could also occur due to nipple enlargement during lactation, along with thinning of the breast skin; as the breast enlarges, pain may develop and intensify during the baby's sucking.