Understanding Varicocele: Symptoms, Causes, and Impact on Fertility in the UK

A varicocele is a common condition where the veins inside the scrotum (the pampiniform plexus) become enlarged and dilated. This is very similar to how varicose veins develop in the legs. These veins are responsible for draining deoxygenated blood from the testicles. When the valves within these veins do not function correctly, blood pools, causing the veins to swell.

According to NHS data, varicoceles affect approximately 15% of the adult male population. They most frequently develop during puberty and are found on the left side of the scrotum in about 85% to 90% of cases. This is primarily due to the angle at which the left testicular vein enters the left renal vein, creating higher pressure compared to the right side.

In many instances, a varicocele is asymptomatic, meaning it causes no noticeable problems and is often discovered during a routine physical examination or a fertility investigation. However, when symptoms do occur, they typically include:

• Scrotal Heaviness: A persistent feeling of weight or dragging in the scrotum.
• Dull Ache: A recurring pain that is often described as a dull throb rather than a sharp sting.
• Visible Veins: The affected side may look or feel like a "bag of worms" when standing up.
• Fluctuating Pain: Discomfort that typically worsens throughout the day or after physical exertion, and is often relieved by lying flat on your back.
• Testicular Size Difference: The testicle on the side of the varicocele may appear smaller (testicular atrophy).

One of the primary concerns for men in the UK diagnosed with a varicocele is the potential impact on male fertility. Research suggests that varicoceles are present in about 40% of men experiencing primary infertility and up to 80% of men with secondary infertility.

The Heat Effect

The testicles are located outside the body cavity to maintain a temperature slightly lower than the rest of the body, which is essential for healthy sperm production. The pooled blood in a varicocele increases the temperature of the scrotum. This heat stress can damage sperm DNA, reduce sperm count, and impair sperm motility (the ability of sperm to swim).

Oxidative Stress

Pooled blood can also lead to an accumulation of reactive oxygen species, leading to oxidative stress, which further harms the delicate process of spermatogenesis (sperm creation). If you are struggling to conceive, a semen analysis is usually the first step recommended by NICE guidelines to assess the extent of the impact.

If you notice a new lump, swelling, or persistent discomfort in your scrotum, it is important to seek medical advice. While many varicoceles are harmless, any scrotal change must be assessed to rule out more serious conditions such as testicular cancer or an inguinal hernia.

You can speak to a GP online to discuss your symptoms in a calm, private environment. An online doctor can:

• Assess the history of your symptoms and the nature of the pain.
• Advise on whether a physical examination or a scrotal ultrasound is required.
• Discuss the implications for your fertility if you are planning a family.
• Provide a referral to a urologist if the varicocele is causing significant pain or measurable testicular shrinkage.
• Offer guidance on conservative management, such as scrotal support or pain relief.

Diagnosis in a UK clinical setting usually involves a physical examination. A doctor may ask you to perform the 'Valsalva manoeuvre' (bearing down as if straining), which increases intra-abdominal pressure and makes the veins more prominent. Varicoceles are typically graded from 1 to 3:

• Grade 1: Small; only palpable during the Valsalva manoeuvre.
• Grade 2: Medium; palpable while standing but not clearly visible.
• Grade 3: Large; easily visible through the scrotal skin (the 'bag of worms' appearance).

If the diagnosis is unclear, a scrotal ultrasound may be used to confirm the presence of dilated veins and measure blood flow.

Treatment for a varicocele is not always required. According to British Association of Urological Surgeons (BAUS) guidance, intervention is usually only considered if there is pain, infertility, or a significant difference in testicular size. Options include:

Conservative Management

For mild discomfort, wearing supportive underwear (such as briefs rather than boxers) can reduce the 'dragging' sensation. Over-the-counter pain relief like paracetamol or ibuprofen may also be used periodically.

Surgical and Radiological Procedures

If treatment is necessary, there are two main paths:

• Varicocele Embolisation: A minimally invasive radiological procedure where a catheter is used to place small coils or fluid to block the affected veins, diverting blood flow to healthy veins.
• Varicocelectomy: A surgical procedure (often performed laparoscopically or microsurgically) to tie off the enlarged veins.