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.
A high RDW blood test result may indicate anemia due to either iron deficiency or a deficiency of folate and vitamin B12, according to Wikipedia. It may also be a result of a recent hemorrhage. False high RDW readings sometimes occur when the wrong type of blood is used for the test. As MedFriendly explains, other causes for a high RDW test result include liver disease and hemolytic anemia.