The penis does not get bigger after puberty, which is usually after the age of 18. Before puberty, the penis is in a state of normal development, generally at puberty, the first sex sign gradually develops and matures, the second sex sign gradually appears, the development of the first sex sign of the male includes the development of the penis, scrotum, testicles, etc. At this time, the penis gradually increases in size to a fixed state, and basically will not change again after puberty. If you have problems such as phimosis, circumcision, cryptorchid penis, developmental micropenis, etc. before puberty, you may have abnormal penile development, so if you find abnormal penile development before puberty, you need to consult a doctor in time to deal with the problem, otherwise it will be difficult to improve the condition when you are over the right age. If you find abnormal penis, it is recommended to go to the regular hospital in time for medical treatment.