I went to do an ultrasound of the soft tissue in my neck due to feeling some lymph nodes. the results i received were bilateral neck lymph nodes are considered normal in size by ultrasound criteria. these may be reactive. what does this mean?

There are thousands of lymph node located around the body. Many in the neck, head, behind the ear are prominent in kids as they are not buried in tissue . At rest these are often 1/4 inch in diameter and may grow to marble sized when reacting to a stimulus. The word reactive implies the noses have been stimulated and are doing their job, nothing more.