Right-sided pain under the armpit may be due to muscle strain, infections, or skin conditions. Sometimes, armpit pain may indicate a more serious issue, such as cancer or a heart issue. The armpit ...

Armpit pain is a common complaint that can have many causes, from mild muscle injuries to swollen lymph nodes and severe skin infections. In most cases, armpit pain isn't a reason to worry, but it can ...

Medically reviewed by Doru Paul, MD Key Takeaways Swollen lymph nodes are often a sign that your body is fighting an infection.Autoimmune diseases can also cause lymph nodes to swell.Certain ...