Thick and short penis is generally clinically referred to as short penis, which may be related to genetic influence, low hormone level and other factors. 1. Genetic factors: such as bilateral cryptorchidism as well as testicular hypoplasia, chromosomal abnormalities and other congenital factors can lead to the phenomenon of short and thick penis in men. 2. Low hormone levels: a lack of testosterone during the developmental period can also affect the development of the penis, leading to the phenomenon of a short penis. 3. Other factors: testicular trauma at an early age, circumcision or phimosis with repeated infections that prevent normal development of the penis, and so on. For men, penile development can be affected by a variety of factors such as heredity, hormones, diseases and so on. If there is obvious penile shortness, it is recommended to consult a doctor as soon as possible for examination and targeted treatment.