Blood in the URINE which may originate in any part of the urinary tract. When the blood comes from the kidney or upper part of the urinary tract, it is usually mixed throughout the urine, giving the latter a brownish or smoky tinge. This condition is usually the result of GLOMERULONEPHRITIS, or it may be present in persons suffering from high blood pressure or PYELITIS. Blood may also appear in the urine when a stone or gravel is present in the pelvis of the kidney setting up irritation, especially after exercise. The blood may also originate from a bladder that is inflamed or infected or which contains benign growths (papillomata) or malignant growths. Inflammation or injury to the URETHRA can also cause haematuria. Anyone with haematuria should seek medical advice. (See also KIDNEYS, DISEASES OF.)