The blood clots can be caused by sleeping on the bed. Disorders of the blood vessels and heart after surgery. Or low blood pressure, etc., making the blood flow in the venous circulation slows down.
The blood clot, which may be caused by sleeping next to bed. Abnormalities of the heart and vascular system, after surgery or complications, low blood pressure, etc. Make blood circulation in blood flow slow down system.
the blood of a wedge may be caused by the failure of the system lay in bed after the surgery or coronary heart and blood pressure, Low blood flow blood flow in the system slow down.