23 doctors weighed in:

What causes low testosterone in men. You say it is not small testes?

23 doctors weighed in
Dr. Robert Stuart
Family Medicine
16 doctors agree

In brief: Many causes

There are many causes for low testosterone.
They include testicular atrophy (small testes that develop), testicular dysgenesis (a genetic illness), stress, diabetes, alcoholism, marijuana use- to mention a few. You should see your physician to sort this out.

In brief: Many causes

There are many causes for low testosterone.
They include testicular atrophy (small testes that develop), testicular dysgenesis (a genetic illness), stress, diabetes, alcoholism, marijuana use- to mention a few. You should see your physician to sort this out.
Dr. Robert Stuart
Dr. Robert Stuart
Thank
1 comment
Dr. Yash Khanna
Also if i may mention as you age the testosterone level gos down,so aging also effects the level of testosterone
Dr. George Klauber
Pediatrics - Urology
3 doctors agree

In brief: Pituitary & testis

Pituitary produces luteinizing hormone which stimulates leydig cells in the testis to produce testosterone.
Level of testosterone acts on hypothalamus of brain regarding secretion of gonadotropin releasing hormone which inturn stimulates lh production.Low t stimulates gnrh secretion, high t supresses.Thus low t can be due to pituitary or hypothalamus problem or primary from testicular leydig cells.

In brief: Pituitary & testis

Pituitary produces luteinizing hormone which stimulates leydig cells in the testis to produce testosterone.
Level of testosterone acts on hypothalamus of brain regarding secretion of gonadotropin releasing hormone which inturn stimulates lh production.Low t stimulates gnrh secretion, high t supresses.Thus low t can be due to pituitary or hypothalamus problem or primary from testicular leydig cells.
Dr. George Klauber
Dr. George Klauber
Thank
Dr. Alvin Lin
Internal Medicine - Geriatrics
3 doctors agree

In brief: Bad luck . . .

In addition to the other answers, long-term narcotic used to treat chronic pain has also been associated w/hypogonadism or low testosterone.
When appropriately treated w/testosterone replacement, there have been reports of being able to decrease narcotic dose.

In brief: Bad luck . . .

In addition to the other answers, long-term narcotic used to treat chronic pain has also been associated w/hypogonadism or low testosterone.
When appropriately treated w/testosterone replacement, there have been reports of being able to decrease narcotic dose.
Dr. Alvin Lin
Dr. Alvin Lin
Thank
Dr. Melissa Young
Internal Medicine - Endocrinology
3 doctors agree

In brief: Many things

Prior use of body-building steroids, pituitary disease, testicular injury, mumps, diabetes, age to name a few.
Small testes can be a clue as to the cause, but is not the cause itself.

In brief: Many things

Prior use of body-building steroids, pituitary disease, testicular injury, mumps, diabetes, age to name a few.
Small testes can be a clue as to the cause, but is not the cause itself.
Dr. Melissa Young
Dr. Melissa Young
Thank
2 doctors agree

In brief: Varies

It can be from prior injury, testicular failure (they quit working), or loss of signal to tell the testicles to work.
There are many diseases that contribute like diabetes, pituitary tumors, steroid use and chronic pain meds. It's more complex than can be listed here. Make sure it's been checked in the morning and if it's really low, see your urologist. For more: www.Peedoc.Com @thepeedoc.

In brief: Varies

It can be from prior injury, testicular failure (they quit working), or loss of signal to tell the testicles to work.
There are many diseases that contribute like diabetes, pituitary tumors, steroid use and chronic pain meds. It's more complex than can be listed here. Make sure it's been checked in the morning and if it's really low, see your urologist. For more: www.Peedoc.Com @thepeedoc.
Dr. Roscoe Nelson
Dr. Roscoe Nelson
Thank
Dr. Thomas Namey
Internal Medicine - Rheumatology
1 doctor agrees

In brief: Obesity and zinc def

Obesity and zinc deficiency are the two most common causes in my practice.
Zinc is essential for testosterone synthesis, and i would encourage all low-t males to take supplemental zinc. Obesity is now more common, because fat cells contain cyclic aromatase, which converts testosterone to estradiol, which turns off the pituitary glands production of fsh and lh!

In brief: Obesity and zinc def

Obesity and zinc deficiency are the two most common causes in my practice.
Zinc is essential for testosterone synthesis, and i would encourage all low-t males to take supplemental zinc. Obesity is now more common, because fat cells contain cyclic aromatase, which converts testosterone to estradiol, which turns off the pituitary glands production of fsh and lh!
Dr. Thomas Namey
Dr. Thomas Namey
Thank
Get help from a real doctor now
Dr. Adam Smith
Board Certified,
13 years in practice
382K people helped
Continue
108,000 doctors available
Read more answers from doctors