Can the nipple go inside when pregnant?

Yes, during pregnancy, hormonal changes can cause the nipples to become more sensitive and, in some cases, retract or appear inverted. This can happen due to increased breast tissue and changes in the surrounding ligaments. However, in most cases, the nipples will return to their normal position after pregnancy or breastfeeding. If there are concerns about nipple retraction, it's best to consult a healthcare professional.