Hi,
This is only a myth that
masturbation can affect the size of penis. Though, during masturbation, there is erection of penis, which can temporarily increase the size of penis, but it comes to its normal size, after some time. Decrease in size of penis due to act of masturbation is all the more unlikely.
Definitely, testosterone has its effect on the growth of genital organs including the size of penis. Therefore size of penis increases during
puberty and even for 3-5 years after puberty due to effect of testosterone. Body needs testosterone to develop testicles and penis, therefore a low level of testosterone may cause a small size of penis. Therefore, if you think that size of your penis has become smaller, then you should consult your doctor, who can advise you for testing your
testosterone level and treatment may be done accordingly, if needed.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Satnarain Bansal, General & Family Physician