1, no penis at all. Most of them are complicated with urethral malformation, and the treatment is quite difficult. In the past, penile plasty was not effective. It is best to remove testicles, do urethroplasty, and use estrogen to maintain female sexual characteristics after puberty. 2. Congenital penis torsion. When the penis twists, the direction of the urethral orifice will change. A few people may have symptoms such as dull pain during erection. This disease is also prone to erectile dysfunction. 3, double penis. Can be arranged in parallel or in front and back. 4, latent penis. Because of its short development time, it is covered by the fat of perineum, scrotum and pubic bone. With the decrease of fat during development, the penis is exposed. You can also liberate the penis through plastic surgery and return to normal. 5, hypospadias and hypospadias. The latter is more common than the former, which has an impact on erectile function and causes male infertility. 6. phimosis It can account for more than 25% of boys, but the adult phimosis is obviously less than that of teenagers. It can be divided into physiological phimosis, pseudophimosis (too long prepuce), true phimosis and incarcerated phimosis. 7. The penis is too big or too small. Rare. If it is too big, it can be shortened by plastic surgery. The etiology of oversize is complex and needs to be properly handled according to the etiology.