I am 26, 5'1", 120 pounds. For the past week my lymph node on the left side of my neck has been swollen and tender. Starting on about Tuesday, my chest has been swollen and tender as well. I did read that we have lymph nodes in our chest/armpit area. Should I see a doctor? A few years ago the lymph nodes in my neck were swollen off and on - I went to the doctor to get a test done. By the time I got there, the swelling had gone down and the doctor said I didn't need tests done, that it was just my body fighting a virus. However this happened multiple times for a period of about 2 years.