MBBS, MRCS(EDIN), MMED(SURG), FRCS(UROL) (RCPSG), FAMS(UROL)
BSC(Monash), MBBS(NSW), FRCS(Glasgow), FRACS, MMED(Surgery), FAMS(Urol)
Seeing blood in your urine is almost always an alarming experience. Many people associate urinary issues with obvious symptoms such as burning pain, abdominal discomfort or other urgent factors. When there is an absence of pain during urinary bleeding (haematuria), it can be particularly confusing.
Painless haematuria can sometimes point to underlying conditions that require timely evaluation. Identifying the cause early allows for appropriate treatment and helps prevent potential complications.
Possible Causes of Non-Painful Haematuria
Blood in the urine can arise from a range of causes, with urinary tract infections being among the more common ones. However, when you are experiencing haematuria without pain, the potential causes tend to be different, and there is a lower likelihood of your bleeding being caused by conditions such as UTIs and bladder stones. Instead, there are several factors that may provide clues as to why blood is present.
Exercise-Induced Haematuria
Strenuous or prolonged physical activity, especially high-impact exercises such as extended long-distance running, can sometimes lead to blood appearing in the urine without pain. This is often referred to as exercise-induced haematuria. It may occur due to repeated impact on the bladder or temporary changes in kidney filtration during intense exertion. In many cases, it resolves on its own within a short period after rest. However, if it persists beyond a few days or happens frequently, further evaluation is recommended.
Physical Trauma
If you have received a physical injury to the kidney or urethral area, you may experience blood in your urine even without immediate pain during urination. Internal trauma may occur from accidents, falls or contact sports. Even if discomfort is minimal or delayed, the damage could cause eventual bleeding.
Angiomyolipoma
Angiomyolipoma is a benign tumour of the kidney made up of blood vessels, muscle and fat. While often asymptomatic, it can sometimes cause painless haematuria if the blood vessels within the tumour bleed. These growths are usually detected through imaging studies and may require monitoring or treatment depending on their size and risk of complications.
Kidney Diseases
Certain kidney conditions, such as glomerulonephritis or other forms of kidney inflammation, can cause blood in the urine without pain. These conditions may affect how the kidneys filter waste and can sometimes present with additional signs such as swelling, high blood pressure or changes in urine appearance. Early detection is important to prevent long-term kidney damage.
Medication
Some medications are known to cause blood in the urine as a side effect. This includes blood thinners and certain chemotherapy drugs, which can increase the risk of bleeding. Long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) may also affect kidney function and lead to haematuria. If symptoms appear after starting or changing medication, it is important to inform your doctor for further assessment.
Kidney Cancer
In some cases, painless haematuria may be an early sign of kidney cancer. It may occur intermittently and without other noticeable symptoms, which can make it easy to overlook. While not all cases of blood in the urine are linked to cancer, the possibility makes it important not to overlook cases of bleeding. Timely medical evaluation is especially important for individuals with risk factors such as smoking, older age or a family history of kidney disease.
When Is Blood in Urine a Cause for Concern?
Haematuria, whether painful or painless, should never be ignored. Even if you can identify a potential trigger, such as recent trauma or exercise, there is still the possibility of an underlying condition that requires medical attention.
It is also important to inform your doctor if haematuria is accompanied by other symptoms such as unexplained weight loss, fatigue, changes in urinary habits or swelling in the body. Individuals with risk factors such as smoking history, older age or a family history of kidney or urinary tract conditions should be especially cautious.
Even if the symptom appears only once, a proper assessment can help rule out more serious causes and provide reassurance. Early diagnosis allows for timely intervention and better outcomes.
Consulting a Urology Specialist for Early Diagnosis and Treatment
Painless haematuria can be subtle, but it should not be dismissed. A specialist evaluation helps determine whether the cause is temporary or linked to an underlying condition that requires attention.
A urologist can perform the necessary tests, such as urine analysis, imaging or endoscopic assessment, to identify the source of bleeding. This allows for a clear diagnosis and appropriate management plan, whether the cause is benign or more serious.
Seeking early medical advice can help potential conditions be detected at an earlier stage, when treatment is often more straightforward and outcomes are more favourable.
At Tan Urology, we strive to address and acknowledge the unique needs of each patient. Care is led by our consultant urologist, Dr Lincoln Tan. Dr Tan ensures that each case is treated with discretion and professionalism, while accounting for the unique needs of each individual patient.
Contact us to book an appointment today.
Frequently Asked Questions (FAQs) About Haematuria
Is blood in urine without pain always serious?
Painless haematuria is not always caused by a serious condition. However, it may not be possible to determine severity without a proper consultation with a doctor. A medical evaluation is key to identifying the cause.
How long should exercise-induced haematuria last?
Exercise-induced haematuria typically resolves within 24–72 hours after stopping the activity. If the blood in your urine persists beyond this period, recurs frequently or appears without intense physical exertion, it is advisable to seek medical advice to exclude other possible causes.
Can dehydration cause blood in urine?
Dehydration itself does not directly cause blood in the urine, but it may contribute to conditions that increase the likelihood of haematuria, such as kidney strain or the formation of crystals in your bladder or kidneys. If you notice blood in your urine, it is important to seek medical evaluation rather than attributing it solely to dehydration.
How is haematuria diagnosed?
A urologist may diagnose haematuria by performing urine tests to detect blood or infection within the bladder. Imaging studies, such as ultrasound or CT scans, can also be used to examine the kidneys and urinary tract, and cystoscopy to view the bladder. These tests help identify the source of bleeding and guide appropriate treatment.
Meet Our Urologists
Dr Lincoln Tan
MBBS, MRCS(Edin), MMED(Surg), FRCS(Urol)(RCPSG), FAMS(Urol)
Dr Lincoln Tan is experienced in managing a wide range of urological conditions, with particular expertise in minimally invasive laparoscopic and robotic-assisted surgery. He is actively involved in advancing evidence-based approaches to improve diagnostic accuracy and clinical decision-making. As principal investigator in the first local study validating the Prostate Health Index for cancer risk assessment, he has contributed to reducing unnecessary biopsies and has been among the clinical leads introducing freehand, office-based transperineal biopsies in Singapore. Dr Tan is committed to comprehensive, patient-centred urological care.
Dr Robert Tan Tin Kiat
BSC(Monash), MBBS(NSW), FRCS(Glasgow), FRACS, MMED(Surgery), FAMS(Urol)
Dr Robert Tan has over 35 years of experience in the diagnosis and management of a wide range of urological conditions. As one of the first urologists in Singapore to perform transurethral resection of the prostate, he has played a key role in advancing minimally invasive urological care. A founding member of the Singapore Urological Association, Dr Tan is also a local pioneer in non-invasive urinary stone treatment, including extracorporeal shockwave lithotripsy. His practice emphasises careful assessment and personalised care supported by appropriate medical technology.