Insect bites can lead to redness, inflammation or swelling and itchiness in the affected area. Occasionally, insect bites can cause intense allergic reactions involving breathing difficulties, formation of hives, etc. It can also adversely affect the skin by causing the appearance of blisters. 2  It is important to note that the insect bite by a brown recluse spider may not initially cause pain, but can later become increasingly sensitive along with the development of a solid lump beneath the skin or a nodule at the affected area.
The hematocrit blood test determines the percentage of red blood cells (RBC's) in the blood. Blood is composed mainly of red blood cells and white blood cells suspended in an almost clear fluid called serum. The hematocrit test indicates the percentage of blood by volume that is composed of red blood cells. The condition called anemia results from having too few red blood cells. Anemia causes a variety of symptoms. The hematocrit is a basic test that can tell a physician a lot about a person's health.
Purpose. Blood is made up of red and white blood cells, and plasma. A decrease in the number or size of red cells also decreases the amount of space they occupy, resulting in a lower hematocrit. An increase in the number or size of red cells increases the amount of space they occupy, resulting in a higher hematocrit.ematocrit (hÄÂ·maËÂ·t Â·krit) , n the number of red blood cells in a sample expressed as a percentage of the total blood volume. The normal hematocrit range is between 43% to 49% in men and 37% to 43% in women.