When my twin sister got the first dose of the Pfizer-BioNTech COVID-19 vaccine at the end of December, she kept noting that her armpit felt swollen. It was similar to the soreness experienced with an ...

Andrew M. Kaunitz, MD: Several weeks ago, I saw a new patient, a woman in her early 50s who reported "swelling in my armpit." In the past week, she had noted that tissue in the upper outer quadrant of ...

Add Yahoo as a preferred source to see more of our stories on Google. Photo credit: Getty Images If you’ve ever experienced swollen lymph nodes, you know how uncomfortable (and temporarily concerning) ...

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 ...

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 ...

Armpit pain can come from injuries, infections, or swollen lymph nodes. To diagnose armpit pain, doctors may use lab tests, physical exams, and imaging studies. Symptoms of armpit pain include ...

The armpit is a complex junction where muscles, nerves, blood vessels, and lymph nodes meet. Because it is such a busy area of the body, experiencing pain there is surprisingly common. For some, it is ...

Learn about the role of lymph nodes in your body, why they swell, the likely causes, and how it might relate to conditions ...