Hi, I Recently Noticed A Node In My Neck When

Hi,

I recently noticed a node in my neck when I'm swallowing that comes and goes (It doesn't interfere with anything, just a nuisance). It gets better with rest and activity, but becomes more prominent when I'm sitting down (such as using a computer). I suspect it may have something to do with incorrect posture while using the computer recently (As an example, I would be facing the wall in one way, but I would tilt my head roughly 90 degrees to view the computer screen). Could it be something else?