Why is it necessary for to undergo a kidney biopsy if one does not have hypertension or diabetes, but detected albumin and blood in urine under microscope?

The most common cause of blood in the urine is still urinary tract infection. Typically, this is also associated with pain with the passage of blood in the urine. The other common cause would be urinary tract stones. Stones can be found in the kidney, the ureter, the bladder or even the urethra. These stones can cause bleeding as they move along the urinary tract. For men, especially more senior individuals, the prostate can be the cause of blood in the urine as enlargement of the prostate can also be associated with the growth of more blood vessels, making it more prone to bleeding.

Hypertension is a common chronic health condition that people tend to overlook as the damage inflicted on the body is usually insidious in the early stages. By the time you start experiencing symptoms, there is usually already damage from the exposure to prolonged untreated/poorly treated high blood pressure or grossly elevated blood pressure. So if your doctor gives you blood pressure medications, please be compliant with your medicine! Should you develop side effects, consult your doctor before adjusting your medications - you might need to change your dose or type of medicine.