my dog whines is she in pain or does she just want attention?

my dog often whines when fx we are at the dinner table eating and shes not allowed around the table because she begs for food and otherwise walks in circles around the table very noisesly, she also whines fx today when she was in my room late at night and i was playing a game on my pc, im wondering since it has been going on for some time, if she should be checked out? or she just wants more attention. thanks in advance for your help