What causes blood thickening?
Do you mean in the sense that it would cause blood to clot?
Blood clots and doesn't clot due to something being wrong with clotting factors in the body... wether it be absence of one or possibly something wrong with another.
Thickening of a blood vessel may occur for a number of reasons. It is usually a result of changes within the vessel wall causing it to become thicker than normal. Alternatively it may arise from an enlargement of the vessel as a whole due to dilatation or birth defects. Thickening of the wall may affect only one part of an artery or vein or result in thickening along the entire length of the vessel. Irregular…
There are two primary differentials if this is an abnormal thickening of the bladder. The first is an infection, such as a bacterial urinary tract infection. The other cause is cancer, such as transitional cell carcinoma. Your physician will probably order a biopsy to collect a sample to look at under the microscope so that he can figure out which one it is.
The three factors that influence peripheral resistance are blood viscosity, blood vessel length, and blood vessel diameter. Increase in blood viscosity causes an increase in blood pressure. Increase in blood vessel length causes in increase in blood pressure. Increase in blood vessel diameter causes a decrease in blood pressure.