It could be an infection, a vaccine response, or an autoimmune disease symptom, per experts.

Lymph nodes are small, bean-shaped structures that are found throughout the body. According to the Cleveland Clinic, they're connected by a network of lymphatic vessels, which transport a clear fluid ...

As I was getting up from my visit with Mrs. Gregory, her right hand went to the base of her neck. Dr. Smith, do you think this little lump is anything?” Though doing her best to portray calm, she ...