Infants and young children with red glans, the more common causes are glansitis, mosquito bites and trauma. 1. glansitis: children usually do not pay attention to genital hygiene has a relationship, especially the presence of circumcision, circumcision of the child, not often wash under the foreskin and glans, resulting in urine residue, prone to bacterial and other microbial infections. 2. Mosquito bites: there is a history of mosquito bites, mosquito bite wounds in the glans, toxins injected into the glans to stimulate the glans and cause allergic reactions and inflammation of the glans skin, followed by redness and swelling. 3. Trauma: there is a clear history of trauma, such as glans impact injury, in addition to the glans red and swollen, accompanied by obvious pain. There are many reasons for the redness of the glans in infants and young children, and it may also be allergies, etc. It is recommended that the child go to the hospital, complete all the examinations, in order to clarify the condition, and then the professional physician will give the appropriate treatment for the condition.