Short answer · Medically reviewed summary · Last updated: 2026-04-07
A varicocele is an enlargement of the veins within the loose bag of skin that holds the testicles (scrotum), often described as feeling like a "bag of worms." While many people with a varicocele experience no symptoms, you should seek medical evaluation if you notice persistent scrotal aching, visible swelling, or concerns regarding fertility, as these veins can sometimes impact sperm production. What are the common signs and symptoms of a varicocele? The most common sign of a varicocele is a visible or palpable lump in the scrotum that may feel like a collection of dilated, twisted veins. Often, these veins become more prominent when standing or straining and may disappear or shrink when lying down.
A varicocele is an enlargement of the veins within the loose bag of skin that holds the testicles (scrotum), often described as feeling like a "bag of worms." While many people with a varicocele experience no symptoms, you should seek medical evaluation if you notice persistent scrotal aching, visible swelling, or concerns regarding fertility, as these veins can sometimes impact sperm production.
The most common sign of a varicocele is a visible or palpable lump in the scrotum that may feel like a collection of dilated, twisted veins. Often, these veins become more prominent when standing or straining and may disappear or shrink when lying down. Many individuals with a varicocele remain asymptomatic, but some report a dull, aching pain or a heavy, dragging sensation in the scrotum that worsens after long periods of standing or physical exertion. Because a varicocele can potentially affect blood flow and temperature regulation in the scrotum, it is also frequently investigated in the context of male infertility evaluations.
When assessing yourself for a varicocele, it is helpful to perform a gentle examination while standing in front of a mirror in a warm room. Look for any visible asymmetry or swelling on either side of the scrotum. Using your fingers, gently feel the area above the testicle; if you feel a soft, cord-like mass that feels similar to a "bag of worms," this is a classic physical sign. It is important to distinguish between normal anatomical variation—such as the epididymis, which is a firm, comma-shaped structure at the back of the testicle—and the soft, compressible nature of a varicocele.
If you suspect you have a varicocele, you should schedule an appointment with a primary care physician or a urologist. Be prepared to describe the duration of your symptoms, any pain patterns, and whether you are currently trying to conceive. Your doctor will likely perform a physical exam while you are standing and may ask you to perform a Valsalva maneuver (taking a deep breath and bearing down) to increase abdominal pressure, which makes the varicocele easier to detect. Common diagnostic steps include:
While a varicocele is generally not a medical emergency, you should seek prompt medical attention if you experience sudden, severe scrotal pain, significant swelling, redness, or a fever. These symptoms could indicate other conditions, such as testicular torsion or epididymitis, which require immediate intervention. Additionally, if you notice a rapidly growing lump that does not change when lying down, you should be evaluated urgently to rule out other testicular pathologies.
If you feel your symptoms are being overlooked, remember that you are the expert on your own body. If a doctor dismisses your concerns, ask specifically: "Could we perform a scrotal ultrasound to rule out a varicocele?" If you remain unsatisfied, seek a second opinion from a board-certified urologist. Joining communities like those on DiseaseMaps.org can also provide peer support and help you prepare for productive conversations with your healthcare team.
Medical disclaimer: This information is for educational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of your physician with any questions regarding a medical condition.