Revenue passenger miles. Revenue passenger miles (or RPM) measures demand for air transport. Itâs calculated as the number of revenue passengers multiplied by the total distance traveled. Itâs also called airline âtraffic.â. An increase in RPM is positive for an airline company. It means that more passengers are using their service.
Definition. An armpit lump is a swelling or bump under the arm. A lump in the armpit can have many causes. These include swollen lymph nodes, infections, or cysts.
Cause #2: Buildup of dead skin cells. According to at least one dermatologist, dark spots under your arms are the result of dead skin cells that are trapped in microscopic âhills and valleysâ on your skin. What To Do About It: Exfoliate, preferably with a product containing lactic acid.