A varicocele typically feels like a dull ache or heaviness in the scrotum, often on the left side. Many people describe a dragging sensation that builds throughout the day and eases when lying down. Some varicoceles cause no pain at all and are only noticed as a soft, lumpy texture above the testicle.
The Ache and Heaviness
The most common sensation is a dull, nagging ache in the scrotum rather than sharp or stabbing pain. It often feels like the testicle is heavier than usual, as though something is pulling downward. This discomfort tends to be low-grade, more annoying than alarming, and it can come and go for weeks or months before someone decides to look into it.
Not everyone with a varicocele feels anything. Smaller ones are frequently discovered during a routine physical or a fertility workup, with the person having had no symptoms at all. When pain does occur, it ranges from a vague sense of fullness to a more persistent ache that’s hard to ignore by the end of a long day.
What It Feels Like to the Touch
If you run your fingers along the area above the affected testicle, you may feel a soft, irregular mass of swollen veins. The classic description is that it feels like a “bag of worms,” a cluster of thin, squiggly cords bunched together just under the skin. A larger varicocele can even be visible when you’re standing, appearing as a noticeable bulge above the testicle. A smaller one may be too small to see but still detectable by touch, especially while standing or bearing down.
The texture is distinctly different from a hard lump. Varicoceles are soft and compressible because they’re dilated veins filled with blood. If you feel something firm or solid, that’s a different finding worth getting checked.
When It Gets Worse
Varicocele discomfort follows a predictable pattern tied to gravity and exertion. Standing for long stretches, heavy lifting, and intense exercise all tend to make the ache worse because blood pools in the enlarged veins when you’re upright. Many people notice the sensation builds over the course of the day, peaking in the afternoon or evening, then fading once they lie down and gravity helps the blood drain.
Hot weather can also intensify the feeling, since heat naturally causes veins to dilate further. Wearing supportive underwear, like fitted boxer briefs or a jockstrap, during exercise or prolonged standing often takes the edge off by reducing the pull of gravity on the scrotum.
Why It’s Almost Always on the Left
About 78% of varicoceles occur on the left side, roughly 20% are bilateral, and only 1 to 2% appear on the right side alone. This lopsided pattern comes down to anatomy: the vein draining the left testicle connects to the left kidney vein at a steep angle, making it harder for blood to flow upward and easier for the vein to swell. So if you feel that dull ache or ropey texture specifically on the left, that’s consistent with how varicoceles typically present.
How Size Affects What You Notice
Varicoceles are classified into three grades based on how detectable they are during a physical exam, and each grade corresponds to a different experience for the person who has one.
- Grade 1 (small): Less than 1 cm. You likely wouldn’t feel this on your own. It’s detected only with careful palpation and becomes more noticeable when bearing down, like the straining motion during a bowel movement.
- Grade 2 (medium): Between 1 and 2 cm. You can feel this without straining. The ropey, worm-like texture is more obvious when standing, and you may notice occasional achiness.
- Grade 3 (large): Visible through the skin of the scrotum without touching it. This grade is most likely to produce that persistent heaviness, visible swelling, and daily discomfort that worsens with activity.
Size doesn’t always predict how much discomfort you’ll have. Some people with a grade 3 varicocele feel relatively little, while others with a grade 2 find the ache disruptive enough to limit certain activities.
How to Check for One Yourself
The easiest time to feel for a varicocele is while standing in a warm shower, which relaxes the scrotum and makes the veins more prominent. Gently roll the tissue above each testicle between your fingers and feel for any soft, lumpy, or cord-like structures that weren’t there before. To make a subtle varicocele more obvious, take a deep breath, hold it, and bear down as though you’re straining during a bowel movement. This temporarily increases pressure in the abdominal veins and pushes more blood into the dilated veins, making them easier to detect.
Compare both sides. Because varicoceles overwhelmingly favor the left, feeling a noticeable difference between the two sides is a useful clue.
The Fertility Connection
There’s no specific sensation that tells you a varicocele is affecting sperm production. The concern is that enlarged veins raise the temperature around the testicle, which can gradually impair sperm quality over time. This process is silent. You won’t feel it happening, and the degree of discomfort you experience doesn’t reliably predict whether fertility is being affected. Many varicoceles are discovered only after a couple has difficulty conceiving and a semen analysis comes back abnormal.
One physical sign worth noting: if the affected testicle feels noticeably smaller or softer than the other, that may indicate the varicocele has been present long enough to cause some shrinkage. This change develops slowly and is easier to detect by comparing both sides during a self-exam.