I've been feeling lightheaded for last 6-7 years. Neither room spins nor i feel like i ll fall while walking it's still the feeling of something at back of my head all the time. There is a little neck stiffness. I felt the same 6-7 years back when I used to study so I visited Ortho doctor he did xray of spine, he said there is nothing. It can be postural. I do feel gastric issues and when gas builds up in the body it makes my head heavy. I wanted to know if I need to check for inner ear issue or some neurological issue it is or gas?