What could be the cause of a hard lump on the penis?

There is a hard lump on the penis; it could be caused by folliculitis or genital herpes. It is recommended to go to the hospital as soon as possible for a check-up to determine the cause and receive appropriate treatment.

1. If folliculitis is the cause, it is usually due to improper cleaning or scratching, resulting in hard lumps that may also become red and swollen, with a yellowish-white pus spot at the center. It is best to use medications such as mupirocin ointment, fusidic acid cream, or compound polymyxin B ointment under the guidance of a doctor. Always follow the doctor’s instructions when using these medications.

2. When genital herpes occurs, symptoms such as redness and rashes typically appear. This condition is caused by the herpes simplex virus, and treatment should be carried out under the guidance of a doctor using medications such as aspirin enteric-coated tablets, acyclovir tablets, valacyclovir hydrochloride tablets, or mupirocin ointment. It is essential to follow the doctor's instructions carefully.

Normally, sexual intercourse should be avoided, as well as the consumption of spicy and stimulating foods, smoking, and drinking alcohol. Fresh fruits and vegetables should also not be eaten. It is recommended to seek medical attention promptly.