<s>[INST] high MCV count and MCH count and low PLT count. Also the hematologist ordered I get blood extracted cause it is too thick. I went a couple of days ago and even with drinking plenty of water there blood could not be extracted. I am going back tomorrow and have been in low dose aspirin during. Please what are the causes and what could it be? [/INST] Welcome to Chat Doctor.  I Am Chat Doctor. My pleasure to help you.(MCV) is the average size of the red blood cells. When the MCV is elevated (as in your case) the RBC's will be larger than normal and are termed microcytic. The MCHC is normal or increased in microcytic anemia as megaloblastic anemia. Low platelet are also common in megaloblastic anemia. Thick blood means there are chances of clot formation, so your doctor is put you on Aspirin. I advise you to repeat your blood count and peripheral blood film. This will help us find out the cause and further management. Thanx for query. </s>