There are white things in the coronal sulcus of the glans, consider circumcision, this situation is mostly seen in foreskin glansitis, usually with circumcision or circumcision. The normal foreskin cavity secretes a lipid-like substance. When the foreskin is too long or circumcised, this substance can accumulate and become foreskin scale, which can stimulate the foreskin and penis head to inflame and cause foreskin glans. Therefore, if there is something white, if there are symptoms such as redness and itching of the foreskin, the appearance of the inner plate or a light red papule at the glans, consider it to be foreskin glansitis, which is in need of treatment. If there is no case of foreskin glansitis, only foreskin scale, usually pay more attention to hygiene, turn over the foreskin every day to wash, pay attention to local cleanliness, develop good hygiene habits, generally can be cured, no need to use medication.