Definition of bisect. transitive verb. : to divide into two usually equal parts. intransitive verb.
1 Muscle Pulls: Pulls of the muscles or ligaments in the chest and injuries to the ribcage may lead to right side chest pain.  Food Blockage: Blockage of the esophagus with food or beverages causes congestion, which can lead to pain in the right side of your chest.
These muscles can cause pain in the right upper back after injuries, such as a muscle strain or bruise from a car accident or fall. Overuse from work or recreational activities, such as painting or playing racket sports, might also be to blame -- especially for people who are right handed.