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.
Causes of low RDW in a blood test? Low RDW causes vary. The level of RDW is low if the reading showed below 10.2 %. It could be associated with various medical disorders, but the most common one is macrocytic anemia. It is a type of blood disease wherein the number of red blood cells is not enough to supplement the needs of the body.