Pea sized lump side of neck, noticed 3 months ago. no bigger or smaller. dr said cud b caused by a zit i had on neck but that went ages ago. lymphoma?

Lymph node: There are thousands of lymph node located around the body that help screen out germs in the body serum. There are many in the neck, head ; behind the ear. At rest these are often 1/4 inch in diameter and may grow to marble sized when reacting to a stimulus. Bug bites, or viral infections can increase their size.They should shrink down to nl size over a few wks if pain not gone then have it chkd.