Haemorrhagic Cystitis: Symptoms, Causes and Treatment in the UK

Haemorrhagic cystitis is a medical condition defined by inflammation of the bladder that results in haematuria (blood in the urine) accompanied by symptoms of bladder irritation. Unlike a standard urinary tract infection (UTI), which may occasionally cause microscopic traces of blood, haemorrhagic cystitis often causes visible, gross haematuria, where the urine appears pink, red, or even tea-coloured with occasional clots.

In the UK, NICE guidelines and NHS protocols emphasize that any visible blood in the urine must be investigated by a healthcare professional. The condition occurs when the delicate lining of the bladder (the mucosa) and its underlying blood vessels become damaged or eroded. This can happen suddenly (acute) or develop over a longer period depending on the cause.

The symptoms of haemorrhagic cystitis can be distressing but are typically confined to the lower urinary tract. Patients often describe a constellation of symptoms known as 'lower urinary tract symptoms' (LUTS). These include:

• Visible Haematuria: Urine that looks red, pink, or brownish.
• Dysuria: A sharp, stinging, or burning sensation when passing urine.
• Frequency and Urgency: Feeling the need to urinate much more often than usual, sometimes with very little notice.
• Suprapubic Pain: A dull ache or pressure in the lower abdomen, just above the pubic bone.
• Nocturia: Waking up multiple times during the night to urinate.

If the bleeding is significant, small blood clots may form in the bladder, which can sometimes cause pain or a temporary blockage of the urethra, making it difficult to empty the bladder completely.

While a simple bacterial infection is a common trigger, haemorrhagic cystitis is often associated with non-infectious causes. Understanding the trigger is vital for effective treatment. Common causes include:

Infection

Bacterial UTIs are the most frequent cause in the general UK population. However, viral infections, such as the adenovirus or polyomavirus, can also lead to severe bladder inflammation, particularly in individuals with weakened immune systems.

Medication and Treatment Side Effects

Certain chemotherapy drugs, such as cyclophosphamide or substituted ifosfamide, are well-known triggers for haemorrhagic cystitis. These medications produce a metabolite called acrolein, which is toxic to the bladder lining. Pelvic radiation therapy for cancers of the prostate, cervix, or rectum can also cause 'radiation cystitis', which may present years after the initial treatment.

Chemical Irritants

Exposure to certain industrial chemicals or even some dyes can irritate the bladder. Additionally, the use of certain recreational substances, most notably ketamine, is a rising cause of severe bladder wall damage and bleeding in the UK—a condition often referred to as 'ketamine bladder'.

If you present to a GP with blood in your urine, they will follow a structured diagnostic pathway aligned with NHS standards. The first step is usually a urine dipstick test to confirm the presence of red blood cells and check for signs of infection (leucocytes and nitrites).

A urine sample may be sent for culture and sensitivity (MC&S) to identify specific bacteria and determine which antibiotics are most effective. If visible blood is present without a confirmed infection, or if symptoms persist, a referral to a urologist may be necessary. This might involve a cystoscopy (a thin camera inserted into the bladder) or an ultrasound scan of the kidneys and bladder to ensure there are no stones or abnormal growths causing the bleeding.

Treatment is tailored to the severity of the bleeding and the underlying cause. For mild cases triggered by infection, a course of antibiotics is usually sufficient. However, broader management strategies include:

• Hydration: Drinking plenty of water (around 2 litres a day) helps to flush out bacteria and prevents the formation of blood clots by diluting the urine.
• Bladder Irrigants: In hospital settings, the bladder may be washed out using a catheter to remove clots.
• Protective Medications: For those undergoing chemotherapy, drugs like Mesna are used to neutralise toxic metabolites before they can damage the bladder.
• Pain Management: Simple analgesics like paracetamol can help, while urinary alkalisers (available over-the-counter in the UK) may reduce the acidity of the urine and alleviate burning.

It is convenient to speak to a GP online if you are experiencing symptoms of bladder irritation or suspect a UTI. An online consultation is suitable for:

• Discussing new urinary symptoms and getting advice on the next steps.
• Arranging for a private prescription of antibiotics if a bacterial infection is suspected.
• Reviewing ongoing bladder discomfort and receiving guidance on symptomatic relief.
• Obtaining a referral letter for private urological investigation if you have had a recurrent issue.

Our clinicians can provide a calm, evidence-based assessment of your symptoms and help you navigate the necessary tests required by UK health standards. However, if you have visible blood in your urine, you must ensure you have a physical examination or follow-up to rule out serious pathology.