I have swollen lymph nodes in neck and armpit in the past eight months. The swelling occurs in neck and armpit often and goes away after two weeks. Sometimes the body has light feverish symptoms when I had a swelling in armpit. I don't know what is the reason but I'm feeling worried. Sometimes the swelling occurs only in neck and it goes away after two weeks or sometimes it occurs in armpit and other areas like behind ears, groin etc.,and it goes away after two weeks. So I want to know the exact reason for this happens