It's usually normal for one testicle to be slightly larger than the other in men. A small difference in size is common and generally not a cause for concern.
Normal Size Difference
Most men have a slight size difference between their testicles. Typically, the right testicle is a bit larger than the left. A difference of around half a teaspoon in volume is considered normal. This is due to natural variations in anatomy.
When to Be Concerned
While a slight size difference is common, a significant or sudden change in size should be evaluated by a doctor. Here are situations that warrant medical attention:
- Sudden enlargement: A testicle that suddenly becomes much larger than the other should be checked.
- Pain or discomfort: Any pain, tenderness, or discomfort in the larger testicle needs evaluation.
- Lump or bump: If you feel a lump or bump on the larger testicle.
- Other symptoms: Any other new or concerning symptoms like swelling, redness, or hardness.
Possible Causes of a Larger Testicle
If the size difference is accompanied by other symptoms, some possible causes include:
- Varicocele: Enlarged veins in the scrotum, similar to varicose veins in the legs. Often feels like a "bag of worms."
- Hydrocele: Fluid accumulation around the testicle.
- Epididymitis: Inflammation of the epididymis (a tube at the back of the testicle that stores and carries sperm).
- Orchitis: Inflammation of the testicle itself.
- Testicular torsion: Twisting of the spermatic cord, cutting off blood supply to the testicle (requires immediate medical attention).
- Testicular cancer: Although less common, any painless enlargement or lump should be evaluated for this possibility.
What to Do
- Self-exam: Perform regular testicular self-exams to become familiar with your normal anatomy. This will help you notice any changes early.
- Consult a doctor: If you're concerned about a size difference or notice any other symptoms, schedule an appointment with your doctor. They can perform a physical exam and order any necessary tests to determine the cause.
Summary
A minor difference in testicle size is normal. However, sudden changes, pain, lumps, or other concerning symptoms require medical evaluation to rule out any underlying conditions.
