Red spots on the stomach of pregnant women may be caused by insect bite reaction, contact dermatitis, stretch marks and other diseases, or by other diseases such as eczema. 1. Insect bite reaction: insect bite reaction is mainly caused by insect bites, patients will appear erythema, small blisters, edema and other symptoms, but also itching, doughnut-like damage and other symptoms. 2. Contact dermatitis: contact dermatitis is caused by the patient’s skin coming into contact with allergic exogenous substances, the patient’s main symptoms are dense papules, erythema, edema, etc., and there will be scabs, ulcers, vesicles and other symptoms. 3. Stretch marks: the etiology of stretch marks is not yet clear, considering the change of skin tension during pregnancy and hormonal changes and other factors. The main symptoms of patients are pink or purple stripes on the abdomen, chest and other parts of the body, occasional itching, burning sensation and other symptoms, some patients will have red spots. 4. Other: eczema, herpes zoster and other diseases can also lead to the phenomenon of red dots on the stomach during pregnancy. Pregnant women with symptoms of red dots on the stomach should seek medical attention in time and follow the doctor’s instructions for treatment.