During pregnancy, bumps on the buttocks of pregnant women may be caused by dermatitis or acne caused by sitting for too long, and there is also a case of physiological manifestations. During pregnancy, try to pay attention not to use irritating drugs or hormonal drugs to avoid affecting the healthy growth of the fetus, pay attention to hygiene, pay attention to cleaning, do not sit for a long time, if sitting for a long time is not conducive to blood circulation will aggravate the symptoms of pimples, if the itch is more serious, you can apply local stove glycol can have an anti-itch effect, to relieve the symptoms of dermatitis, usually The actual fact is that you should try to wear loose cotton underwear to reduce the stimulation of the skin.