If a 3 year old child is circumcised, the foreskin can be flipped frequently to help the glans show up. If the foreskin is too tight and can’t be flipped up, you can wait for development or puberty to undergo surgery. If the foreskin is too tight and can’t be turned up, you can wait for development or puberty to have surgery. 3-year-old children with prepuce, usually physiological factors, due to the lack of development of the penis, with the growth of age can be self-healing. Daily can help the child flip the foreskin, so that the glans gradually revealed, to pay attention to the foreskin too long lead to the emergence of inflammation, pay attention to hygiene. If the foreskin is too tight and there is no way to turn it up, you can wait for development or puberty to be treated with circumcision; if infections occur frequently, circumcision can also be considered. Daily to keep the penis and foreskin hygiene and dry, to avoid the emergence of complications caused by the prepuce, physiological prepuce can disappear on its own, daily attention to observation can be, the emergence of obvious abnormalities need to actively go to the hospital for diagnosis and treatment.