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.
Poor hygiene can cause armpit boils because of the dirt that is trapped within the hair follicle. Failure to bathe regularly can cause excess dirt, sweat and bacteria to collect under the armpit, causing a painful boil to appear. The boil may be either red or dark in color and is usually sensitive to the touch. According to the Better Health Channel, armpit boils may occur due to buildup of dead skin cells and bacteria on the skin under the arm.