Ulcers on the coronal groove of the glans may be related to syphilis, genital herpes, bacterial infections and so on. 1. Syphilis: syphilis spirochete infection can be caused by sexual impurity and other reasons, resulting in ulcers on the coronal skin of the glans. Patients suspected of syphilis infection are recommended to undergo syphilis serum rapid reaction test for clear diagnosis and treatment. 2. Genital herpes: Genital herpes is also a sexually transmitted disease, which mainly manifests as pain, itching or ulcers in the genital area, and male patients with genital herpes may develop ulcers on the skin of the glans coronal groove. It is recommended to carry out herpes simplex virus testing and other tests to clarify the diagnosis and then treatment. 3. Bacterial infection: the glans coronal groove can be broken during sex, leading to local bacterial infection and ulceration to form ulcers. There are many other reasons that can lead to ulcers on the glans coronal groove, it is recommended that such patients go to a regular hospital to get a clear diagnosis of the cause and actively deal with it.