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.
Sore Armpit. Causes of a Sore Armpit. A swollen or sore armpit can be a painful and frightening condition. The entire armpit may feel sore, or you may have soreness in just one spot. Many people will feel these painful, hard lumps under the arm and be afraid that it is a cancerous growth.f you do not have swollen lymph nodes, a swollen or sore armpit may be caused by an infection in the layers of skin, sometimes called cellulitis. People get these infections frequently under their arms from nicks caused by shaving.