Hi Doctor, I am concerned by what I think is swelling of my lymph nodes. I have bad sun burn around my neck, which turned rough and itchy. There are two pea sized lumps that move slightly when i press on them on either side of the back of my neck, and a disturbingly large lump right under my right clavicle. It s about the size of a small marble, and it moves as well, and feels somewhat hard. I just returned from three bahamian islands, and also visited the everglades, full of mosquitos i hear. anything you can tell me would be appreciated.