Children with swollen mouths and swollen eyes may be a symptom of certain diseases, such as insect bite dermatitis, allergies, infections, cardiac or renal function abnormalities, etc., and should be promptly consulted to find out the cause of the disease. 1. Insect bite dermatitis: localized skin allergic and inflammatory reactions occurring after being bitten by insects, different insect species and differences in body reactivity, mainly manifested as bright red doughnut-like papules on the skin, which may be accompanied by itching, usually improves within a few hours or a few days, and sometimes lasts for a longer period of time. 2. Allergy: mainly due to the patient’s contact with allergens, patients often first itchy skin, followed by the appearance of erythema, doughnuts, bright red or pale white, skin color, a few patients only have edematous erythema. 3. Infection: a variety of pathogenic microorganisms invade the body in different ways, so that the normal function of the body, metabolism, tissue structure is destroyed, causing local tissue and systemic inflammatory reaction. It can cause many types of skin damage, such as papules, blisters, pustules, plaques, nodules, scales, redundant organisms, etc., and may also be accompanied by itching, pain and other discomforts. 4. Abnormal heart or kidney function: Suffering from more serious congenital heart disease, myocarditis, acute glomerulonephritis, nephrotic syndrome and other diseases, can appear in the child’s mouth swollen, swollen eyes. Children with swollen mouth and swollen eyes, not to rule out other factors, it is recommended that parents should take their children to the doctor in a timely manner, ask the doctor to clarify the cause, give targeted treatment.