Generally speaking UV lamps are harmful to pregnant women. Ultraviolet lamp is a device that can emit penetrating radio waves, mainly short-wave ultraviolet rays, will not penetrate the skin, but if the pregnant woman is exposed to high intensity of ultraviolet radiation, it will also make the protein denaturation, which may lead to redness and swelling of the skin. And ultraviolet lamps will also have some ultraviolet radiation, long-term close exposure to the fetus is also a certain impact. However, if it is indirect short-term exposure, the amount is not large, generally will not cause significant harm to the human body. It is recommended that pregnant women avoid prolonged exposure to ultraviolet light, usually can go outdoors to walk around and breathe fresh air. If the pregnant woman is exposed to ultraviolet light after the physical discomfort, need to consult a doctor in time, by the doctor to give targeted treatment.