Mucus moistens and cleans the nasal membranes, humidifies air, traps and clears inhaled foreign matter, and fights infection. Although it is normally swallowed unconsciously, the feeling of it accumulating in the throat or dripping from the back of your nose is called post-nasal drip.
RDW refers to the variation in size if your red blood cells. A â¦ low RDW means that the cells are all roughly the same size. A high RDW means there isa high variation in the sizes of the cells and usually means a deficiency of iron and/or B12.
Another scenario is that the RDW level can be high, but the MCV level can be low. This can happen. because of iron deficiency anemia. Iron deficiency anemia is a decrease in hemoglobin in the blood. that is caused by an inadequate supply of iron.