Painful Erection: Causes & When to Seek Help

Painful Erection: Causes, Treatment and When to See a Doctor

Published: 15 October 2026

A painful erection is not normal and can be a sign of several underlying conditions that need medical attention. Pain during or after an erection may be caused by Peyronie's disease (curvature with scar tissue), priapism (a prolonged, painful erection lasting over four hours), infection, injury, or inflammation. If you experience a painful erection, especially one that lasts more than four hours or is accompanied by severe curvature, fever, or discharge, you should seek medical advice promptly to prevent complications and preserve sexual function [1][2].

What Causes a Painful Erection?

Pain during an erection can arise from several causes, ranging from benign to serious. Peyronie's disease is one of the most common reasons; it involves fibrous scar tissue (plaques) forming inside the penis, leading to curvature, shortening, and pain during erection [1]. The pain often improves over time, but the curvature may persist or worsen without treatment.

Priapism is another important cause: a prolonged, painful erection unrelated to sexual arousal that lasts more than four hours. This is a medical emergency because blood becomes trapped in the penis, depriving tissue of oxygen and risking permanent damage [2]. Priapism can occur spontaneously or be triggered by certain medications, blood disorders (such as sickle cell disease), or recreational drug use.

Other causes include balanitis (inflammation of the glans), urinary tract infections, sexually transmitted infections, penile fracture (a tear in the erectile tissue, usually from trauma during sex), phimosis (tight foreskin), or referred pain from conditions like prostatitis. Rarely, pain can be a side effect of erectile dysfunction treatments if used incorrectly, though licensed oral PDE5 inhibitors such as sildenafil and tadalafil do not typically cause pain when used as directed [3][4].

Peyronie's Disease and Painful Erections

Peyronie's disease affects up to 9% of men and is characterised by the development of fibrous plaques in the tunica albuginea, the sheath surrounding the erectile tissue [10]. These plaques cause the penis to bend or curve during erection, and many men experience pain, particularly in the early 'active' phase of the disease. The pain usually subsides after 12–18 months, but the curvature often remains.

The exact cause is not fully understood, but Peyronie's is thought to result from repeated minor injury during sex, combined with genetic and inflammatory factors. Risk factors include age (most common in men over 40), family history, connective tissue disorders, smoking, and diabetes [1][2]. Diagnosis is usually clinical, based on history and examination; ultrasound or other imaging may be used to assess plaque location and severity.

Treatment depends on the stage and severity. In the active phase, oral medications (such as pentoxifylline or colchicine), vitamin E, or topical verapamil are sometimes tried, though evidence is limited. Intralesional injections (collagenase or verapamil) and extracorporeal shockwave therapy may help in selected cases. Surgery (plication, grafting, or penile prosthesis) is reserved for stable disease with significant curvature that impairs sexual function [2][8]. Men with Peyronie's disease can often still use oral ED treatments like sildenafil or tadalafil if they also have erectile dysfunction, but a prescriber will assess suitability on an individual basis.

When Peyronie's Disease Affects Erectile Function

Many men with Peyronie's disease also develop erectile dysfunction, either because the plaques interfere with blood flow or because anxiety and pain reduce confidence [2]. PDE5 inhibitors such as sildenafil, tadalafil, vardenafil, and avanafil can help achieve and maintain an erection sufficient for intercourse, even in the presence of curvature, provided the underlying vascular and nerve supply is intact [3][4][5][6]. A prescriber will review your symptoms, medical history, and any current medications during an online consultation to ensure treatment is safe and appropriate.

Priapism: A Medical Emergency Causing Painful Erection

Priapism is defined as a persistent erection lasting more than four hours without sexual stimulation, and it is almost always painful [1][2]. There are two main types: ischaemic (low-flow) priapism, where blood cannot drain from the penis, causing oxygen deprivation and severe pain; and non-ischaemic (high-flow) priapism, usually caused by trauma and typically less painful. Ischaemic priapism is the more common and dangerous form, requiring urgent treatment to prevent permanent erectile dysfunction and tissue damage.

Causes of priapism include sickle cell disease and other blood disorders, certain medications (including some antidepressants, antipsychotics, and blood thinners), recreational drugs (cocaine, cannabis), alcohol, and spinal cord injury. Rarely, PDE5 inhibitors or intracavernosal injections (such as alprostadil) can trigger priapism if misused or if the dose is too high [7]. However, when oral ED medicines like sildenafil or tadalafil are used as prescribed, the risk of priapism is extremely low.

If you have an erection lasting more than four hours, go to A&E immediately. Treatment may involve draining blood from the penis with a needle, injecting medication to constrict blood vessels, or, in severe cases, surgery. Prompt treatment (ideally within 4–6 hours) greatly improves the chance of preserving normal erectile function [2]. Do not wait or try to manage it at home.

Other Causes of Erection Pain

Infections and inflammation can also cause a painful erection. Balanitis (inflammation of the glans) and posthitis (inflammation of the foreskin) may result from poor hygiene, fungal or bacterial infection, or irritants such as soaps. Symptoms include redness, swelling, discharge, and pain during erection or urination [1]. Treatment usually involves topical antifungals or antibiotics and improved hygiene; circumcision may be recommended for recurrent cases or severe phimosis.

Sexually transmitted infections (STIs) such as chlamydia, gonorrhoea, or herpes can cause pain, discharge, and sores. Urethritis (inflammation of the urethra) and prostatitis (inflammation of the prostate) may also lead to discomfort during erection or ejaculation. If you have symptoms such as unusual discharge, burning when urinating, or genital sores, see your GP or visit a sexual health clinic for testing and treatment [1].

Penile fracture, though rare, is a urological emergency. It occurs when the erect penis is bent forcefully, tearing the tunica albuginea. Men typically hear a cracking sound, followed by immediate loss of erection, severe pain, swelling, and bruising. Penile fracture requires urgent surgical repair to prevent long-term complications such as curvature and erectile dysfunction [2]. Phimosis (tight foreskin that cannot retract) can cause pain during erection, especially in adults; treatment may include topical steroids or circumcision.

Pain After Using ED Treatments

Oral PDE5 inhibitors (sildenafil, tadalafil, vardenafil, avanafil) do not typically cause penile pain when used correctly [3][4][5][6]. However, intracavernosal injections of alprostadil (Caverject) or urethral alprostadil (Vitaros) can occasionally cause pain, aching, or a burning sensation [7]. If you experience unexpected pain after using any ED treatment, stop and speak to a healthcare professional. Never exceed the recommended dose or frequency, as this increases the risk of priapism and other side effects.

When to See a Doctor About Painful Erections

You should see a doctor if you experience any of the following: an erection lasting more than four hours (this is a medical emergency requiring immediate A&E attendance); sudden, severe pain during or after sex, especially with a popping sound or rapid swelling (possible penile fracture); persistent pain during erections over several weeks, particularly if accompanied by curvature or lumps (possible Peyronie's disease); pain with discharge, sores, fever, or difficulty urinating (possible infection); or any unexplained, recurrent penile pain [1][2].

Your GP or a urologist will take a history, examine you, and may arrange blood tests, urine tests, or imaging (ultrasound or MRI) to identify the cause. Early diagnosis and treatment can prevent complications such as permanent erectile dysfunction, scarring, or tissue damage. Do not be embarrassed—painful erections are a medical symptom, and healthcare professionals are trained to assess and manage them confidentially and professionally.

For men with erectile dysfunction (with or without pain), Cured Pharmacy offers a confidential online consultation service. A UK-registered prescriber will review your medical history and current medications to determine whether oral ED treatments such as sildenafil, tadalafil, vardenafil, or avanafil are safe and suitable for you. These medicines require a prescription and are only supplied after clinical assessment.

Treatment Options and Support for Painful Erection Conditions

Treatment depends entirely on the underlying cause. For Peyronie's disease, options range from watchful waiting (if pain is mild and curvature minimal) to medical therapy, injections, or surgery in more severe cases [2][8]. Men with Peyronie's who also have erectile dysfunction may benefit from PDE5 inhibitors; these can improve rigidity and make intercourse possible despite curvature, though they do not correct the bend itself.

Priapism requires emergency treatment to drain blood and restore circulation; long-term management focuses on treating the underlying cause (e.g. sickle cell disease) and avoiding triggers [2]. Infections are treated with antibiotics or antifungals, and inflammation often responds to topical steroids or improved hygiene. Penile fracture needs surgical repair, ideally within 24–48 hours. Phimosis may be managed with steroid creams or circumcision.

If you have erectile dysfunction without pain, Cured Pharmacy can help. We offer a range of licensed oral ED treatments, all requiring an online consultation reviewed by a UK prescriber. Options include Sildenafil from £0.45 per tablet (£0.36 with code Ednew on your first order), Tadalafil from £7.95 (£6.36 with code Ednew), Vardenafil at £16.95 (£13.56 with code Ednew), and Spedra (avanafil) at £20.95 (£16.76 with code Ednew). Branded Viagra and Cialis are also available. All prices include the prescriber consultation and delivery.

How Cured Pharmacy Can Help

Cured Pharmacy is a GPhC-registered online pharmacy (GPhC 9012511) offering discreet, professional care for erectile dysfunction. Complete a short online consultation, and a UK-registered prescriber will review your answers, medical history, and current medications. If treatment is appropriate, your prescription is dispensed by our pharmacy and delivered in plain, unmarked packaging. We stock a full range of PDE5 inhibitors, including generic and branded options, at transparent prices. Our pharmacists are available to answer questions about your treatment, side effects, or interactions.

Scientific References

1. NHS. (n.d.). Erectile dysfunction (impotence). NHS website. https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ [accessed 15 October 2026]
2. National Institute for Health and Care Excellence. (n.d.). Erectile dysfunction. Clinical Knowledge Summaries. https://cks.nice.org.uk/topics/erectile-dysfunction/ [accessed 15 October 2026]
3. Joint Formulary Committee. (n.d.). Sildenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/sildenafil/ [accessed 15 October 2026]
4. Joint Formulary Committee. (n.d.). Tadalafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/tadalafil/ [accessed 15 October 2026]
5. Joint Formulary Committee. (n.d.). Vardenafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/vardenafil/ [accessed 15 October 2026]
6. Joint Formulary Committee. (n.d.). Avanafil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/avanafil/ [accessed 15 October 2026]
7. Joint Formulary Committee. (n.d.). Alprostadil. British National Formulary. NICE. https://bnf.nice.org.uk/drugs/alprostadil/ [accessed 15 October 2026]
8. European Association of Urology. (n.d.). EAU Guidelines on Sexual and Reproductive Health. https://uroweb.org/guidelines/sexual-and-reproductive-health [accessed 15 October 2026]
9. Feldman, H. A., Goldstein, I., Hatzichristou, D. G., Krane, R. J., & McKinlay, J. B. (1994). Impotence and its medical and psychosocial correlates: Results of the Massachusetts Male Aging Study. Journal of Urology, 151(1), 54–61. https://pubmed.ncbi.nlm.nih.gov/8254833/ [accessed 15 October 2026]

Information on this page is for educational purposes only and is not medical advice. Prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting or changing any medication.