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Why do my testicles shrink when I get cold?

ANSWER

For your testicles to produce sperm, they must be kept at just the right temperature. As a result, scrotum will change size to make sure the testicles stay at that right temperature. This happens without you even thinking about it. So, when you are cold, your body sends a message to the scrotum to shrivel and preserve heat.

From: Testicles FAQ WebMD Medical Reference

SOURCES:

Nemours Foundation: "Male Reproductive System."

Nemours Foundation: "Is It Normal for One Testicle to Be Bigger?"

American Academy of Pediatrics: "Physical Development in Boys: What to Expect."

American Academy of Pediatrics: "Boys' Secondary Sex Characteristics."

Great Ormond Street Hospital: "Hanging Testicles."

American Cancer Society: "Do I Have Testicular Cancer?"

Reviewed by Dan Brennan on October 22, 2017

WAS THIS ANSWER HELPFUL

SOURCES:

Nemours Foundation: "Male Reproductive System."

Nemours Foundation: "Is It Normal for One Testicle to Be Bigger?"

American Academy of Pediatrics: "Physical Development in Boys: What to Expect."

American Academy of Pediatrics: "Boys' Secondary Sex Characteristics."

Great Ormond Street Hospital: "Hanging Testicles."

American Cancer Society: "Do I Have Testicular Cancer?"

Reviewed by Dan Brennan on October 22, 2017

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.