Testicular Asymmetry and Semen Color Changes - Urology

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One side of the testicle feels abnormal?


I recently noticed that one of my testicles seems smaller and different compared to the other side, and I hardly experience nocturnal emissions.
Additionally, my semen is always yellow.
Is there any issue with this?

W, 20~29 year old female. Ask Date: 2007/04/20

Dr. Cai Zongyou reply Urology


Hello: In response to your question, please visit the outpatient clinic for an examination and ultrasound evaluation to determine if there is a varicocele issue.

Reply Date: 2007/04/20

More Info


Testicular asymmetry and changes in semen color can be concerning for many individuals, and it's important to understand the potential implications of these observations.
Firstly, it's not uncommon for men to notice some degree of asymmetry in their testicles. In fact, it is normal for one testicle to be slightly larger or hang lower than the other. However, if you notice a significant difference in size, especially if one testicle has become noticeably smaller or if there are any accompanying symptoms such as pain, discomfort, or changes in the skin of the scrotum, it is advisable to seek medical attention. Conditions such as testicular atrophy, varicocele, or even testicular torsion can lead to changes in size and may require evaluation by a healthcare professional.

Regarding the color of your semen, it is typically a whitish or grayish color. However, variations can occur due to several factors, including diet, hydration levels, and frequency of ejaculation. Yellow semen can sometimes be attributed to the presence of urine in the semen, which can happen if there is a retrograde ejaculation, or it may be due to dietary factors such as the consumption of certain foods (like asparagus or foods high in beta-carotene). Additionally, yellow semen can indicate an infection or inflammation in the reproductive tract, such as prostatitis or epididymitis, especially if accompanied by other symptoms like pain, swelling, or unusual discharge.

The absence of nocturnal emissions (commonly referred to as "wet dreams") is not inherently a cause for concern. Many men experience variations in the frequency of these occurrences, and it can be influenced by factors such as age, sexual activity, and hormonal levels. However, if you are experiencing a significant change in your sexual function or libido, it may be worth discussing with a healthcare provider.

In summary, while some degree of testicular asymmetry is normal, significant changes in size or the presence of other symptoms warrant a medical evaluation. Similarly, while yellow semen can be benign, it can also indicate underlying issues that may need to be addressed. If you have concerns about these changes, it is best to consult a healthcare professional who can provide a thorough examination and appropriate tests to rule out any serious conditions. Regular check-ups and open communication with your doctor about any changes in your body are key to maintaining reproductive health.

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