The redness and swelling of the genitals of little boys is usually caused by infection, mostly bacterial or fungal infection, which can be treated by general care, medication and surgery. 1. General treatment: pay attention to local hygiene, you can use water to clean the local skin, give the baby more water, light diet, change underwear, promote the recovery of local inflammation. 2. Drug treatment, according to the cause of infection under the guidance of the doctor to give the corresponding treatment, bacterial infection can be given oral cefixime anti-infection, but also can be applied topical erythromycin ointment treatment; fungal infections can be given fluconazole and other drugs antifungal treatment. 3. Surgery: If the baby’s prepuce is too long, the prepuce causes repeated infections, resulting in adhesion of the urethra, it is recommended to go to the pediatric surgery department of the hospital in time for surgical treatment. Little boy genital redness and swelling may have other reasons, such as mosquito bites, etc., it is recommended that timely medical treatment, targeted treatment or treatment, the use of medication to follow the doctor’s instructions.