6 doctors weighed in:
Why does polycythemia cause bleeding?
6 doctors weighed in

Dr. Martha Stark
Psychiatry
5 doctors agree
In brief: Abnormal platelets
Individuals with polycythemia (an acquired disorder of the bone marrow that causes an abnormal increase in all three blood cell types: red blood cells, white blood cells, and platelets) have an increased tendency to form blood clots that can result in strokes or heart attacks.
Some people also have abnormal bleeding because their platelets (responsible for clotting) are abnormal.

In brief: Abnormal platelets
Individuals with polycythemia (an acquired disorder of the bone marrow that causes an abnormal increase in all three blood cell types: red blood cells, white blood cells, and platelets) have an increased tendency to form blood clots that can result in strokes or heart attacks.
Some people also have abnormal bleeding because their platelets (responsible for clotting) are abnormal.
Dr. Martha Stark
Dr. Martha Stark
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