What Causes Periodic Swelling Of Lymph Nodes In Armpit, Neck And Groin?

what causes the superficial lymph nodes on one side of the body to periodically swell and then go down. I was on allergy shots for six months, stopped because I was feeling lousy and my lymph nodes in armpit, neck , clavicle and groin on the right side kept swelling. THIS SITE IS DISGUSTING FOR ASKING FOR MONEY AFTER ASKING ALL THE INFORMATION AND YOU SHOULD BE ASHAMED OF YOURSELF. NO REAL DOCTOR WOULD BE A PART OF THIS.