There is a layer of gray skin in the glans crown groove. It can't be rubbed off. I always feel a little itchy. I also found several small red pimples on the glans after taking a bath. Is it a venereal disease
The coronal groove of the glans appears in this situation, which is generally the symptom of prepuce glans inflammation. If you have not had sex, you will not be infected with sexually transmitted diseases.
At ordinary times, you should pay attention to regulating sexual behavior to prevent sexually transmitted diseases. If it's convenient for you, you can send me a symptom photo and let me have a look.