Haemorrhagic Cystitis: Symptoms, Causes and Treatment in the UK

Haemorrhagic cystitis is a specific type of bladder inflammation that leads to the lining of the bladder becoming swollen and bleeding. While many people in the UK are familiar with regular cystitis (usually a simple bacterial infection), the 'haemorrhagic' variant is distinguished by the presence of blood in the urine, known as haematuria.

This condition can range from microscopic traces of blood only detectable via a dipstick test to 'gross haematuria', where the urine appears pink, red, or contains visible clots. In the UK, any instance of visible blood in the urine is considered a symptom that requires urgent medical investigation to ensure there is no serious underlying pathology, such as bladder cancer or significant trauma.

The symptoms of haemorrhagic cystitis often mirror those of a severe Urinary Tract Infection (UTI), but the presence of blood is the defining factor. Patients typically report:

• Haematuria: Urine that looks like tea, cola, or bright red beetroot juice.
• Dysuria: A sharp, burning, or stinging sensation when passing urine.
• Frequency and Urgency: A sudden, desperate need to go to the toilet, even if only a small amount of urine is passed.
• 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 you notice clots in your urine, this is a sign of more significant bleeding and should be assessed by a healthcare professional immediately.

While regular cystitis is usually caused by E. coli bacteria, haemorrhagic cystitis has a broader range of triggers. According to clinical guidance used by the NHS, the most common causes include:

1. Viral Infections

Certain viruses, particularly Adenovirus (types 7, 11, 21, and 35), are known to cause sudden bladder bleeding, especially in children or individuals with weakened immune systems.

2. Chemotherapy and Radiotherapy

In the UK, certain chemotherapy drugs like cyclophosphamide and ifosfamide are well-known triggers. These drugs break down into a substance called acrolein, which irritates the bladder lining. Similarly, pelvic radiation for prostate or cervical cancer can cause 'radiation cystitis', which may present months or even years after treatment.

3. Bacterial or Fungal Infections

While less common, severe untreated bacterial infections can lead to erosions in the bladder wall, resulting in bleeding.

4. Chemical Irritants

Exposure to certain industrial chemicals or dyes has been linked to bladder wall damage.

When you consult a doctor regarding these symptoms, the diagnostic process usually begins with a urinalysis. A dipstick test will confirm the presence of red blood cells, protein, and nitrites (which suggest a bacterial infection). Your GP will also likely send a urine sample to the laboratory for a 'Culture and Sensitivity' (MC&S) test to identify any specific bacteria.

If the bleeding is persistent or the cause is unclear, NICE (National Institute for Health and Care Excellence) guidelines recommend further investigations. These may include an ultrasound of the kidneys and bladder, or a cystoscopy—a procedure where a small camera is inserted into the bladder to check for stones, polyps, or tumours.

Treatment for haemorrhagic cystitis depends entirely on the identified cause. Standard UK medical approaches include:

• Hydration: Drinking plenty of water is the first line of defence. This helps 'flush' the bladder, preventing blood clots from forming and blocking the urethra.
• Antibiotics: If a bacterial infection is detected, a course of nitrofurantoin or trimethoprim may be prescribed.
• Pain Relief: Over-the-counter options like paracetamol or ibuprofen can help manage abdominal discomfort.
• Bladder Irrigation: In severe hospital cases involving clots, a catheter may be used to wash out the bladder with saline.
• Specialist Medication: For chemotherapy-induced cases, drugs like Mesna are used to neutralise toxins in the bladder.

If you are experiencing painful urination or increased frequency, you can speak to a GP online for a clinical assessment. An online doctor can review your symptoms, advise on appropriate pain relief, and, if a bacterial UTI is suspected, provide a prescription for antibiotics to be collected at a local UK pharmacy.

However, because blood in the urine always requires a physical follow-up or diagnostic testing, an online GP will often serve as your first point of contact to determine the urgency of your condition. They can provide a sick note if your symptoms are debilitating and guide you on whether you need an urgent face-to-face referral to a urologist.