15 weeks pregnant belly long red dots, may be skin allergies, cholestasis syndrome, pregnancy itchy rash and other reasons, through away from allergens, skin care, medication to improve the symptoms. 1. Skin allergies: 15 weeks pregnant women in contact with some allergic substances, such as animal hair, drugs, shrimp, etc., the stomach skin metamorphic reaction, there will be red dots, to understand their own allergens and stay away from, if accompanied by symptoms of itching, you need to use glycerine lotion to relieve. 2. Cholestasis syndrome: cholestasis syndrome is associated with significantly higher levels of estrogen during pregnancy, heredity, environmental factors, can cause red spots on the stomach, good skin cleaning care, try to avoid scratching the skin, the patient supplemented with vitamin K, aminotransferase abnormalities in the use of hepatoprotective drugs, such as arbutinoside bile, S-adenosylmethionine and so on. 3. pregnancy itchy rash: general or localized itchy skin during pregnancy, the degree of mild and severe, severe restlessness, unbearable is called pregnancy itchy rash, will be 15 weeks pregnant with red dots on the stomach, itching can be coated with glycerite lotion. Red dots on the stomach of 15 weeks pregnant should go to the hospital to check the cause, under the guidance of the doctor to give targeted treatment. In addition, the specific use of the above medicines needs to be under the guidance of a doctor.