High blood pressure will cause elevated urinary protein. Long-term hypertension will lead to glomerular basement membrane damage, increased glomerular basement membrane permeability, and plasma proteins will leak out through the basement membrane, resulting in elevated urinary protein. Persistent long-term hypertension will cause renal tubular damage, resulting in decreased tubular reabsorption of protein, causing elevated urine protein, long-term hypertension will cause kidney damage, called hypertensive nephropathy. Patients with persistent elevated urine protein will lead to elevated blood creatinine, which will eventually cause renal insufficiency and quantum toxicosis, and hypertensive patients should control their blood pressure early to prevent the deterioration of renal function.