A homocysteine blood test is done to: 1  Help identify vitamin B12 deficiency or folic acid deficiency. 2  Help identify a rare inherited disease (homocystinuria) that causes a deficiency of one of several enzymes needed to convert food to energy.  Help determine a cause for otherwise unexplained blood clots.
Category : Causes of Bed Sores. Common Causes of Bed Sores. Bedsores are damaged skin caused by a lack of proper blood flow to the skin because of pressure. The bedsore can occur in individuals at any age when bedridden, in a chair or wheelchair without the ability to reposition themselves.
Things that cause pressure sores include: 1  Pressure on the skin and tissues. 2  Sliding down in a bed or chair, which can cause the skin to fold over itself (shear force). 3  Being pulled across bed sheets or other surfaces, which can cause friction burns.  Excess moisture, such as from sweat, urine, or feces.