Injuries to the testicles usually do not affect the size of the penis, but it is important to be aware of the need for timely examination to determine whether sexual function is affected. If there is a mild testicular injury, early localized pain and swelling can occur. As psychological fear can affect the penis erection, need to pay attention to not make the penis smaller. At the same time, this does not affect sexual function. If there is a severe testicular injury, it may cause testicular necrosis, resulting in testicular atrophy. Due to the reduction of androgen secretion, it may lead to erectile dysfunction, but it has no significant effect on the size of the penis. However, timely consultation is needed to avoid serious impact on sexual function. During treatment, you need to actively cooperate with the doctor for treatment and psychological counseling.