I found it this morning. It's neither painful nor itchy. I feel it when I touch it. Only when I squeeze it can I feel some pain. Currently not used
From the picture, this should be an infection, which is related to your failure to pay attention to hygiene. It is recommended to clean the perineal area frequently and don't pick it with your hands. Otherwise, it will fester in two days. You can use erythromycin ointment externally for anti-inflammatory treatment until the inflammation subsides completely.
If acne grows on the penis epidermis, it is mostly caused by local folliculitis. Strengthen skin cleaning in daily life. Iodophor can be used locally for disinfection, and erythromycin ointment or baiduobang ointment can be applied after drying. Choose loose and breathable cotton underwear and avoid tight pants.
Acne grows on the surface of the penis. Considering bacterial infection or genital herpes, you need to go to the hospital for urology examination. You can also take medicine first. You can disinfect with Iodophor and apply baiduobang ointment. Usually pay attention to cleanliness and hygiene, don't stay up late, don't eat pepper, drink more boiled water and urinate more.