This may give your inner lips a little more exposure. Prominent outer lips sit much lower on your vulva. Labia have dozens of natural variations. This is the medical term for enlarged labia. It could be caused by a sexually transmitted infection or other underlying condition. See your doctor if the bump persists or is accompanied by itching, burning, or other unusual symptoms. Use this time to explore your unique anatomy and learn more about your body. Breastfeeding, fat tissue, vessel for expression - nipples are a wondrous and complicated body part.