3.2.Repetitive forward arm movements during sprints, boxing, push-ups or bench presses can result inserratus anterior muscle painon one or both sides of the chest, which can radiate down the inside of an arm and into the pinky and ring finger; the pain can be aggravated by deep breathing[...
Muscle injuries are one of the most common causes of pain. Muscle strain (pulled muscle)due to arm overuse or overstretching can cause sudden pain, tenderness and mild swelling in the muscles in the front, behind or below the armpit. Armpit pain withbruisingcan be caused by using crutches, ...