2, mosquito bites: abdominal red spots may also be caused by mosquito bites, especially in summer, more mosquitoes, pregnant women need to pay attention to the living environment, you can use mosquito nets to prevent mosquitoes; 3, allergies: due to changes in hormone levels in the body during pregnancy, may make the body resistance to decline, at this time if allergic factors stimulate the skin, can cause pimples, eczema and other reactions. Pregnant women need to avoid allergens, and timely medical treatment, follow medical advice, do not use drugs on their own to avoid adverse effects on the fetus; 4, cholestasis: pregnant women with red spots on the abdomen should also be excluded from cholestasis. Cholestasis is common in the middle and late stages of pregnancy, because the burden on the liver increases during pregnancy, so the rate of bile acid excretion will be reduced, usually manifested as red dots on the abdomen with local itching symptoms, and in serious cases, the phenomenon of yellowing of the skin on the abdomen. In serious cases, this can lead to fetal death, so pregnant women who experience this symptom need to seek medical attention in time for a clear diagnosis. When a pregnant woman has a red spot on her abdomen, she should pay attention not to scratch it with her hands to avoid local bacterial infection. It is recommended to wear cotton clothing daily and avoid wearing clothing with high fiber content, which can cause irritation to the abdominal skin of pregnant women.