Armpit pain can also be caused by acute injuries to muscles or ligaments during ... you can feel more pain in the chest area or under the arm," says O'Hare. Pain often occurs in both armpits ...

Often, armpit pain is a simple case of a strained muscle. "The most common causes ... you can feel more pain in the chest area or under the arm," says O'Hare. Pain often occurs in both armpits ...

Risk factors include: Rotator cuff injuries primarily affect the shoulder but can cause referred pain in the bicep area. The ...

A dull feeling in your left arm could be from overuse or strain. Learn what causes pain on this part of the arm here and ...