Two moles biopsied. one on chin shaved off, healed without a mark. a month later it has started to grow back a light pink-brown color. it's half it's original size. should i see my dr. again?

Dermatologists: always schedule follow up visits. a change in a wart or mole in shape/growth/color are potentially serious warning signs Without an actual examination, I cannot give specific medical advice on your particular health, especially dermatologic conditions. and, the dermatologist would essentially always have follow up visits even wtihout this.

Yes: Moles don't grow back unless they were incompletely removed. See your doctor.