2.1.1.Coronary heart disease, usually after the age of 40, can cause recurring pain behind the breastbone that can radiate to the left shoulder blade, neck andjawand down the inside of the left arm, hand and fingers; other symptoms may include shortness of breath, dizziness and fatigue[1...
Serratus anterior muscleoveruse can result in stabbing pain in the side of the chest,shoulder bladeand inner side of the arm. Pectoralis minorsyndrome includes pain below the collarbone, in the armpit and upper back. Long thoracic nerve injury on the side of the chest can result in numbness a...