What does it mean if a routine urinalysis detects occult blood?

Given that current living standards still require improvement, people increasingly prioritize their health in daily life and routinely undergo medical examinations. Some individuals discover occult blood in their urinalysis during such check-ups but remain unaware of its underlying cause. So, what does occult blood in a routine urinalysis signify?

What Causes Occult Blood in Routine Urinalysis?

Infectious diseases are common causes of occult blood in urinalysis. Urinary tract infections (UTIs) can occur at any age. Conditions such as glomerulonephritis, cystitis, and pyelonephritis may all lead to a positive result for occult blood in urine. UTIs are associated with factors including low immunity and inadequate personal hygiene practices.

Urolithiasis (urinary stones): In middle-aged and elderly individuals, the detection of occult blood in routine urinalysis—whether due to bladder stones or stones in the kidneys or ureters—should raise suspicion of urolithiasis. Such stones may induce occult blood in urinalysis. The etiology of urolithiasis is multifactorial, involving geographic region, ethnicity, age, dietary habits, lifestyle, and individual constitutional factors.

Neoplastic diseases: Benign or malignant tumors affecting the kidneys, bladder, or ureters may also cause occult blood in urinalysis. Notably, occult blood in urine may represent the earliest clinical sign of malignancy. Additionally, trauma to the urinary system can likewise result in a positive occult blood test. We hope this information proves helpful!