Any episode of visible blood in the urine in a person over 40 must be investigated with a cystoscopy. Do not wait for it to recur. Do not assume it is infection without proper investigation.
You noticed the water in the toilet is pink. Or red. Or perhaps a routine urine test reported "blood ++" and your doctor has referred you. Whatever route brought you here, blood in the urine — haematuria — is one of the most important symptoms in urology, and it demands proper investigation.
This article explains what haematuria means, what causes it, when it is serious, and what to do next.
1. Visible versus microscopic haematuria
- Urine appears pink, red, or brown
- May be heavy or light
- Always requires urgent urology referral
- Even a single episode must be investigated
- Urine looks normal
- Red blood cells seen on microscopy or dipstick
- Persistent microscopic haematuria also warrants investigation
- Especially significant in those over 40
Both types are clinically significant in the right context. Visible haematuria is always an indication for urgent evaluation. Persistent microscopic haematuria (positive on two or more urine tests, with no obvious benign cause) also warrants full urological investigation in adults over 40.
2. What causes blood in urine
Blood in urine has many possible causes — from entirely benign to serious. The origin can be anywhere along the urinary tract: kidneys, ureters, bladder, prostate (in men), or urethra.
Common causes
- Urinary tract infection (UTI): The most common cause of haematuria in women, especially with associated burning and frequency. However, UTI must be confirmed — haematuria should not simply be attributed to infection without a urine culture.
- Kidney stones: Often cause blood alongside flank pain (renal colic). Sometimes stones cause haematuria without pain.
- Benign prostatic hyperplasia (BPH): Enlarged prostate in older men can cause haematuria, often with urinary symptoms.
- Exercise-induced haematuria: Vigorous exercise can cause transient microscopic haematuria — resolves within 24–48 hours of rest.
Serious causes that must be excluded
Bladder cancer, kidney cancer, and upper tract urothelial carcinoma all present with haematuria — often painless. These cannot be excluded without proper investigation.
- Bladder cancer: The most important cause to exclude in patients over 40 with visible haematuria. Classically painless, intermittent, and may resolve spontaneously — which patients sometimes interpret as reassurance. It is not.
- Kidney cancer (Renal Cell Carcinoma): Usually causes haematuria only when the tumour is advanced or invades the collecting system.
- Upper tract urothelial carcinoma (UTUC): Cancer of the ureter or renal pelvis. Less common but presents with haematuria.
- Prostate cancer: Can cause haematuria but more commonly presents with elevated PSA.
3. When is it serious — red flags
Any visible haematuria in a person over 40
A single episode of blood visible to the naked eye in someone over 40 is a red flag that requires urgent urology referral and cystoscopy — even if it resolved.
Painless haematuria
The absence of pain is actually more concerning, not reassuring. Bladder cancer classically causes painless haematuria. Pain alongside bleeding more often suggests a benign cause (infection, stones).
Haematuria in a smoker
Smoking is the single biggest risk factor for bladder cancer, increasing risk 3–4 fold. Any haematuria in a current or former smoker must be taken particularly seriously.
Microscopic haematuria that recurs
A single episode of microscopic haematuria in a young person is usually benign. But if it recurs on repeat testing, or appears in someone over 40, investigation is warranted.
4. The investigation pathway
Investigation of haematuria aims to identify the source and exclude malignancy. The standard pathway involves:
Urine microscopy and culture
Confirms the presence of blood, checks for infection, and looks for red cell casts (which suggest kidney disease rather than urological pathology).
Urine cytology
Examination of cells shed into the urine. Can detect high-grade urothelial cancer cells but is not sensitive enough to exclude cancer on its own.
Ultrasound of kidneys and bladder
Evaluates the upper tract for kidney masses, cysts, and stones. Checks bladder wall thickness. Available, inexpensive, and radiation-free.
CT Urogram
A contrast CT scan specifically designed to image the entire urinary tract — kidneys, ureters, and bladder — in multiple phases. Definitive imaging for upper tract pathology.
Cystoscopy (bladder camera examination)
The essential investigation for bladder haematuria. A thin flexible or rigid camera is passed into the bladder through the urethra under local anaesthetic (flexible) or spinal/general (rigid). This directly visualises the bladder lining and can detect even small tumours that imaging misses.
Flexible cystoscopy is done under local anaesthetic gel in an outpatient setting and takes approximately 5–10 minutes. Most patients describe it as uncomfortable rather than painful. It is the most accurate way to examine the bladder lining and cannot be replaced by any scan.
5. The UTI misconception — a critical issue
One of the most dangerous patterns I see in clinical practice is haematuria in older women being attributed to a urinary tract infection — and the patient being treated with antibiotics, the blood resolving, and no further investigation being done.
A urine culture showing bacteria does not mean that the bacteria caused the haematuria. Bladder cancer and UTI can coexist. A woman over 50 with haematuria needs cystoscopy regardless of whether a urine culture is positive. The UTI does not close the investigation.
This is particularly relevant in India, where haematuria in women is often reflexively managed as a UTI — and referred to a gynaecologist rather than a urologist. The result is that bladder cancer is frequently diagnosed late in Indian women.
The rule is simple: any haematuria in a person over 40 needs a cystoscopy. Treating a urine infection is appropriate — but it does not substitute for that cystoscopy.
- Do I need a cystoscopy — and will it be flexible (clinic-based) or rigid?
- Should I have a CT urogram — to image the upper urinary tract as well?
- Is this likely to be infection — and if so, why do I still need cystoscopy?
- I am a smoker — how does that change the investigation priority?
- If the cystoscopy is normal — what follow-up do I need?
- If a tumour is found — what happens next?
This article is for general patient education only and does not constitute medical advice. Any episode of blood in the urine should be assessed by a qualified urologist. Do not delay seeking evaluation based on information in this article.