What are these small polyps I've developed on my chest?

Q: I'm five months pregnant, and I've developed small polyps on my chest. What are these and should I be worried about them?

A: These growths, commonly called skin tags, are normal. They usually pop up in places where clothing rubs against your skin, like under the arms and beneath your bra and underwear. "During pregnancy, increased estrogen levels stimulate overgrowth of normal skin," explains dermatologist David E. Bank, M.D. "Skin tags are completely harmless and often disappear after pregnancy." If they don't, your doctor can perform a simple laser procedure to remove them. You can't do much to treat them while you're expecting, however. "Even if your doctor did remove them during pregnancy, a new crop would spring up until your hormones returned to normal," Bank says.