The penis may become smaller in relation to aging. The penis is one of the important organs of the male, mainly composed of two penile corpus cavernosum and one urethral corpus cavernosum, with the functions of sexual intercourse, urination and ejaculation. When the penis is sexually stimulated, the local area will be engorged with blood and become larger. However, some people will experience a smaller penis, which may occur if the penis has been traumatized or surgically removed. With the increase of age, the function of the penis will also appear to decline, after a longer period of time may appear localized atrophy, which will appear the phenomenon of penis shrinkage. It is recommended that you exercise more on a daily basis, develop good living habits and strengthen your physical fitness. If the penis itself is small, you can also choose penis lengthening surgery if necessary. If the length is moderate, there is no need to be too nervous, it is recommended to maintain a good mood.