Is It Normal for One Testicle to Be Smaller? Testicular Size Differences

Unequal testicular size?

I usually don't feel anything unusual, but since high school, my left testicle has always been smaller than the right one.
The right testicle is about 3 to 4 centimeters, while the left one is only about 1 centimeter.
There are no obvious abnormalities, no pain, and no lumps.
Given this situation, do I need to go to the hospital for an examination?

Hsuān, 10~19 year old female. Ask Date: 2021/02/19

Dr. Li Xinyi reply Urology

It seems that there is quite a significant size difference.
I recommend that you see a urologist for an examination, such as a scrotal ultrasound, to better understand your current condition.
After that, you may even need to have regular follow-ups!

Reply Date: 2021/02/19

More Info

It is not uncommon for one testicle to be smaller than the other, and many men experience some degree of asymmetry in testicular size. In fact, it is quite normal for the left testicle to hang lower than the right, and size differences can vary from person to person. However, there are several factors to consider when evaluating whether this asymmetry is a cause for concern.

Firstly, it is essential to understand that testicular size can be influenced by various factors, including genetics, hormonal levels, and overall health. If you have always noticed that your left testicle is smaller than the right and there are no accompanying symptoms such as pain, swelling, or lumps, it is likely that this is a normal anatomical variation. Many men have one testicle that is slightly larger or smaller than the other, and this is typically not a sign of any underlying health issue.

However, if you notice any changes in size, shape, or consistency of the testicles, or if you experience pain or discomfort, it is advisable to seek medical evaluation. Conditions such as testicular torsion, varicocele, or epididymitis can cause changes in testicular size and may require treatment. Additionally, if there is a sudden change in size or if one testicle becomes significantly larger or smaller than the other, it is essential to consult a healthcare professional.

In your case, since you have mentioned that the left testicle has consistently been smaller without any pain or other symptoms, it may not be necessary to seek immediate medical attention. However, regular self-examinations of the testicles can help you monitor for any changes. During a self-exam, you should feel for any lumps, swelling, or changes in texture. If you notice anything unusual, it is best to consult a healthcare provider.

It is also worth noting that hormonal imbalances can affect testicular size. Conditions such as hypogonadism, where the body does not produce enough testosterone, can lead to smaller testicles. If you have concerns about your hormonal health or if you experience symptoms such as decreased libido, fatigue, or changes in mood, discussing these with a healthcare provider may be beneficial.

In summary, while it is generally normal for one testicle to be smaller than the other, it is crucial to be aware of any changes or accompanying symptoms. If you have any concerns about your testicular health or if you notice any changes, it is always a good idea to consult with a healthcare professional for a thorough evaluation. Regular check-ups and self-examinations can help ensure that any potential issues are addressed promptly.

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