Disease of the microscopic blood vessels that feed the white matter of our brain is associated with worse cognitive function and memory deficits in individuals with Alzheimer's, scientists report.

While microscopic blood in your urine may not be a medical emergency, visible blood in your urine is associated with a number of serious health issues, including kidney disease and urologic cancer.

Lingering COVID-19 symptoms in "long haulers" may be caused by an overload of inflammatory cells "trapped" inside insoluble microscopic blood clots, according to researchers at Stellenbosch University ...

CHICAGO – Adolescents and young adults who had persistent, microscopic blood in their urine (hematuria) were more likely to develop end-stage renal disease over a follow-up period of about 20 years, ...

Occult blood is when you can’t see blood in your urine with your eye and it’s only visible under a microscope. You may need antibiotics or different treatments depending on the infection or other ...

In a recent study, researchers have unveiled the presence of peculiar microscopic structures in the blood of Long COVID patients. These formations, reported on November 13, 2025, are described as ...

NEW YORK (Reuters Health) - When a dipstick test suggests there's blood in the urine, the next step should be to examine a sample of the urine under a microscope to make sure the dipstick result is ...

Visible blood in the urine is not a typical symptom of interstitial cystitis (IC). However, in some cases, lab tests may show microscopic blood in the urine of people with IC. Doctors refer to blood ...

Scientists link tiny particles in blood vessels with substantially higher risk of death ...