The main reason for this is allergic reactions and viral infections. 1. allergic reactions: such as acute urticaria, in addition to small red dots on the baby’s tummy, the child also shows symptoms such as itching and wind masses of different sizes, mostly due to allergies to food, animals, plants, drugs and other factors. It is necessary to actively identify the cause, check the allergens, avoid re-exposure, use antihistamines as prescribed by the doctor, and use glucocorticoid therapy if necessary; 2. Viral infections: viruses such as rubella virus and measles virus can cause red rashes on children’s bodies, and are accompanied by fever symptoms. It is necessary to go to the hospital for examination to confirm the type of virus. There is no specific treatment for rubella, but you can take herbal medicines to clear the heat and detoxify the body, while paying attention to bed rest and giving symptomatic treatment for the child’s symptoms. There is no specific medicine for measles virus, it is contagious and needs to be treated in isolation, and symptomatic treatment should be actively carried out according to medical advice, such as appropriate amount of antipyretics for high fever and sedatives for irritability. During the treatment period, it is necessary to take more rest, eat easily digestible and nutritious food, replenish sufficient water, and keep the skin and mucous membranes clean; 3. Other: pigmented moles and hemangiomas can also cause small red dots on the baby’s tummy, which need to be examined to clarify the type of disease and can be removed by laser or surgery.