Undescended Testicle and Erectile Dysfunction

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What Is an Undescended Testicle?

An undescended testicle occurs when one or both testicles fail to move down into the scrotum before birth. Normally, testicles develop inside the abdomen and descend into the scrotum during the final months of pregnancy. In about 3–5% of full-term baby boys, one or both testicles remain in the abdomen or groin at birth. Most descend naturally within the first few months of life, but if they do not, surgical correction (orchidopexy) is usually recommended, ideally before the age of two.

If left untreated, an undescended testicle can lead to reduced fertility, a slightly increased risk of testicular cancer, and potential hormonal imbalances. The testicle may produce less testosterone if it remains in a warmer environment outside the scrotum, and this hormonal effect can sometimes persist into adulthood even after surgical correction. Early treatment improves outcomes, but some men who had an undescended testicle in childhood may still experience long-term effects on sexual and reproductive health.

How Does Undescended Testicle and Erectile Dysfunction Connect?

The link between undescended testicle and erectile dysfunction is primarily hormonal. Testicles produce testosterone, the main male sex hormone essential for sexual desire, erections, and overall sexual function. If one testicle remains undescended or is removed, the remaining testicle usually compensates by producing enough testosterone. However, if both testicles are affected, or if the descended testicle also has reduced function, testosterone levels may be lower than normal.

Low testosterone (hypogonadism) can contribute to erectile dysfunction by reducing libido and affecting the physical mechanisms of erection. Studies suggest that men with a history of cryptorchidism may have slightly lower testosterone levels on average, though many still have levels within the normal range. Psychological factors also play a role: concerns about body image, fertility, or past surgery can contribute to performance anxiety, which is a common cause of ED. It is important to note that most men with a history of undescended testicle do not develop erectile dysfunction, and when ED does occur, it is often multifactorial and treatable.

Other Factors That May Contribute

Erectile dysfunction is rarely caused by a single factor. Even if you have a history of undescended testicle, other common causes such as stress, anxiety, diabetes, high blood pressure, smoking, obesity, or cardiovascular disease may be more significant contributors to ED. A thorough assessment by a healthcare professional can help identify all relevant factors and guide appropriate treatment.

How Is the Link Between Undescended Testicle and Erectile Dysfunction Assessed?

If you are experiencing erectile dysfunction and have a history of undescended testicle, your GP or a specialist will take a detailed medical and sexual history. They will ask about the timing and severity of your ED, any previous surgeries, current medications, and lifestyle factors such as smoking, alcohol use, and exercise. A physical examination may include checking blood pressure, examining the genital area, and assessing secondary sexual characteristics.

Blood tests are often recommended to measure testosterone levels, as well as other hormones such as luteinising hormone (LH) and follicle-stimulating hormone (FSH), which help assess testicular function. Tests for blood sugar (to check for diabetes), cholesterol, and thyroid function may also be performed, as these conditions commonly contribute to ED. If testosterone is found to be low, further investigation may be needed to determine the cause and whether testosterone replacement therapy is appropriate.

In some cases, your doctor may refer you to a urologist or endocrinologist for specialist assessment, particularly if there are concerns about testicular function, fertility, or complex hormonal issues. Imaging such as an ultrasound is rarely needed for ED assessment but may be used if there are concerns about testicular structure or blood flow.

What you need to know

• An undescended testicle may contribute to ED through low testosterone, but most men have normal function
• Blood tests can check testosterone levels and identify treatable hormonal causes
• PDE5 inhibitors like sildenafil and tadalafil are effective first-line treatments for ED
• Lifestyle changes such as exercise, healthy diet, and stopping smoking support erectile function
• See your GP for persistent ED, as it can signal underlying health conditions

Lifestyle Measures to Support Erectile Function

Regardless of whether an undescended testicle is contributing to your erectile difficulties, healthy lifestyle choices can significantly improve erectile function and overall wellbeing. Regular physical activity improves blood flow, supports cardiovascular health, and can boost testosterone levels naturally. Aim for at least 150 minutes of moderate exercise each week, such as brisk walking, cycling, or swimming.

Maintaining a healthy weight is important, as obesity is strongly linked to both low testosterone and erectile dysfunction. A balanced diet rich in vegetables, fruits, whole grains, lean protein, and healthy fats supports vascular health and hormone production. Reducing alcohol intake and stopping smoking are among the most effective steps you can take: smoking damages blood vessels and significantly increases the risk of ED, while heavy drinking lowers testosterone and impairs sexual performance.

Managing stress and mental health is equally important. Anxiety, depression, and relationship difficulties are common contributors to ED and can be addressed through talking therapies, counselling, or support from your GP. Open communication with your partner about concerns and expectations can reduce performance pressure and improve intimacy. If you suspect low testosterone or other hormonal issues, these lifestyle measures should complement, not replace, medical assessment and treatment.

Sleep and Hormonal Health

Good-quality sleep is essential for testosterone production, which occurs mainly during deep sleep. Chronic sleep deprivation or untreated sleep apnoea can lower testosterone levels and worsen erectile function. If you snore heavily, feel excessively tired during the day, or have been told you stop breathing during sleep, speak to your GP about a sleep assessment.

Treatment Options for Undescended Testicle and Erectile Dysfunction

Treatment for erectile dysfunction in men with a history of undescended testicle depends on the underlying cause. If testosterone levels are low and causing symptoms, testosterone replacement therapy (TRT) may be recommended by a specialist. TRT is available as gels, injections, or patches and can improve libido, energy, and erectile function in men with confirmed hypogonadism. However, TRT is not suitable for everyone and requires careful monitoring, as it can affect fertility and has other potential side effects.

For most men, oral medications called PDE5 inhibitors are the first-line treatment for erectile dysfunction, regardless of whether there is a history of undescended testicle. These medicines—sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and avanafil (Spedra)—work by increasing blood flow to the penis in response to sexual stimulation. They do not affect testosterone levels but can effectively treat ED caused by a wide range of physical and psychological factors. All require a prescription and are taken shortly before sexual activity, though tadalafil is also available as a lower daily dose.

If oral treatments are not effective or suitable, other options include alprostadil (a medicine applied as a cream or injection directly to the penis), vacuum erection devices, or in some cases penile implant surgery. Psychological therapy or psychosexual counselling can be very helpful if anxiety, stress, or relationship issues are contributing to ED. Your GP or a specialist can discuss which treatments are most appropriate for your individual situation.

When to Consider Specialist Referral

If initial treatments are not effective, if you have complex medical or hormonal issues, or if there are concerns about fertility, your GP may refer you to a urologist or endocrinologist. Specialist input can help tailor treatment and address any underlying testicular or hormonal problems related to your history of cryptorchidism.

When to get urgent help

• Erection lasting more than 4 hours (priapism) – go to A&E immediately
• Sudden loss of vision or hearing after taking ED medication – seek urgent medical help
• Chest pain during or after sexual activity – call 999
• Severe dizziness or fainting after taking ED medication – seek same-day medical advice
• Painful swelling or lump in the testicle – see your GP urgently or attend A&E

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.

Treatment Cautions Specific to Undescended Testicle and Erectile Dysfunction

PDE5 inhibitors such as sildenafil, tadalafil, vardenafil, and avanafil are generally safe and effective for men with a history of undescended testicle, provided there are no other contraindications [1][2]. However, these medicines must never be taken with nitrates (such as GTN spray or isosorbide mononitrate), nicorandil, riociguat, or recreational drugs called poppers, as the combination can cause a dangerous drop in blood pressure [3][4][5][6]. If you take alpha-blockers for prostate symptoms or high blood pressure (such as tamsulosin or doxazosin), you should be stable on that treatment and start on the lowest dose of a PDE5 inhibitor, as there is a risk of dizziness or low blood pressure.

Some medicines can interact with PDE5 inhibitors by affecting how they are broken down in the body. Potent CYP3A4 inhibitors, such as ritonavir, cobicistat, ketoconazole, itraconazole, or clarithromycin, can increase levels of PDE5 inhibitors and require dose adjustments or may make certain PDE5 inhibitors unsuitable. Conversely, CYP3A4 inducers like rifampicin, carbamazepine, phenytoin, or St John's wort can reduce the effectiveness of these treatments. Your prescriber will review all your current medicines during the online consultation to ensure safety.

If you are taking testosterone replacement therapy, it is important to inform your prescriber, as TRT can affect cardiovascular risk and blood counts, which may influence the suitability of certain ED treatments. PDE5 inhibitors are not suitable if sexual activity is inadvisable due to severe heart disease, recent heart attack or stroke, very low blood pressure, or a history of sudden vision loss (NAION). Always disclose your full medical history, including your history of undescended testicle and any surgeries, during the consultation to ensure safe and effective treatment.

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