Children’s penis is red, swollen and pus-filled, which is considered to be related to factors such as not paying attention to local hygiene and cleanliness, glans, long foreskin or prepuce. 1. Do not pay attention to local hygiene and cleanliness: generally due to children do not pay attention to hygiene and cleanliness around the penis, so that it is easy to bacterial infection, penis in the bacterial infection under the stimulation of the phenomenon caused by the children’s penis red, swollen, pus, you can follow the doctor’s instructions to use erythromycin ointment and other medicines, can play a role in anti-inflammatory and so on. 2. glansitis: may be due to inflammatory lesions around the glans, gradually aggravated, stimulate the local glans, so that it produces discomfort, and then appeared in the phenomenon of children’s penis red, swollen, pus, and there will be pain, swelling and other symptoms, can be used under the guidance of the doctor, erythromycin ointment and other medicines to treat. 3. Circumcision or phimosis: It is usually due to the children’s circumcision or phimosis, resulting in the appearance of foreskin scale around the penis, so that it and the glans continue to friction, and will lead to glans infection, which in turn causes children’s penis redness, swelling and pus phenomenon. A long foreskin or circumcision may result in the glans not being able to be fully exposed when the penis is erected, which can be treated with surgery such as circumcision. All the above drugs need to pay attention to the side effects and adverse reactions of drugs, please use the above drugs under the guidance of a doctor. If the phenomenon of redness, swelling and pus in the penis of children occurs, they should go to the hospital in time to avoid delaying the condition and adverse consequences.