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The extra red blood cells make your blood thicker than normal. As a result, blood clots can form more easily. These clots can block blood flow through your arteries and veins, which can cause a heart attack or stroke. Thicker blood also doesn't flow as quickly to your body as normal blood.
Taking â¦ both could cause the blood to become too thin and to not clot when it's necessary, like when there's been an accident. I am not a doctor or nurse, but I do have some other training (personal care aide). Also, a close relative and a former client of mine have been on blood thinners before.