An intercostal muscle strain is a type of muscular injury that occurs between two or more ribs in the chest.The intercostal muscles are a group of muscles that run between the ribs.muscle between the ribs (intercostal muscles) Intercostal muscles are a collection of muscles that run between the ribs and serve to shape and move the chest wall.
There are many distinct types of intercostal muscles.The intercostal muscles are primarily responsible for the mechanical element of breathing, since they assist in expanding and contracting the chest cavity.Wikipedia (https://en.wikipedia.org/wiki/Wikipedia) The intercostal muscles, sometimes known as the intercostals, are a group of muscles that link the ribs and serve to form the upper chest wall.
This group of muscles can produce substantial discomfort in the mid- and upper back when they overstretch or rupture.