Hello, and I hope I can help you today. It is very common for pre-existing moles, freckles, or other skin lesions to grow slightly during pregnancy due to hormonal changes. The skin generally gets more sensitive as well, so you may very well have some chafing from your underwear on this lesion if it has gotten more prominent during the pregnancy.. Fortunately, moles usually go back to their original size after you have the baby. In the meantime, applying some sort of lubricating lotion, or even plain Vaseline petroleum jelly twice daily to help lubricate the area and prevent the skin from cracking should be enough to care for the area until after the baby is born. If it still bothers you but when you are six weeks postpartum, you may want to have the mole removed by a dermatologist. I hope I was able to adequately answer your question today, and that my advice was helpful. Best wishes, Dr. Brown