When does the penis stop growing?

Patient's question:

I recently don't know why my lower body is very uncomfortable, and I also don't get morning erections anymore. When does the penis stop growing?

Doctor's answer:

An adult male penis is 11-16 cm long and 10.8 cm in circumference when erect; in a natural state, it is 7-9 cm long and 6.9-9.4 cm in circumference. For adult males, sexual development typically matures around the age of 18, after which secondary growth does not occur. As most people know, male dysfunction can cause significant harm to patients, so it is important to seek treatment as soon as possible. In daily life, attention should be paid to dietary issues—opt for a light diet and avoid foods. Additionally, regular follow-up visits may be necessary when needed.

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