Nodule that appeared on lip in third trimester

At her regular OB appointment, a 31-year-old woman pregnant with her first child expressed concern about a nodule that had appeared on her lip in the past two weeks. Currently in her third trimester, she had only been taking prenatal vitamins since the beginning of her pregnancy. The red, friable papule had a well-defined rim of skin at the base and would bleed spontaneously if accidentally brushed against.