There are different types of clots, and some are more serious than others. Unfortunately some of the most serious clots can have no symptoms at all. My husband has been in intensive care twice with blood clots in his lungs and is not on Coumadin for the rest of his life. He didn't even have abnormal pressure in his chest when he had his blood clots. The first time he had a blood clot, he felt "funny" for about 5 minutes, then had a sharp pain in his chest and immediately passed out. Apparently the sharp pain was a clot passing through a valve in his heart. If there's a clot in one of the extremities, there can sometimes be a deep feeling of aching or pressure. Clots in the legs, for example, can be in one of two systems. The deep veins lead to the heart and a clot there is extremely serious. The other vessels lead away from the heart and aren't as serious. Unfortunately there's no way of knowing without tests.
at 4:43 PM on May. 23, 2010