The male genitalia are divided into external and internal genitalia, and there are a wide variety of diseases, all with different clinical symptoms.
Overall, they can be divided into penile diseases, scrotal and testicular diseases, prostate diseases and seminal vesicle diseases. Common symptoms include localised pain at the site of onset, localised itchy skin rash, erectile dysfunction, premature ejaculation, localised lumps, discomfort in urination, ejaculation disorders, haematochezia, reduced semen quality, etc. These symptoms may occur individually or two or more together.