I am 2 months post, have lost 83lbs (50 since surgery) and have been getting head rushes/lightheaded every time I bend over or get up from sitting. I thought it was because of blood pressure meds, but as of 2 days ago I am off all of those - am still getting dizzy. I don't think its hydration as I am drowning in water. Anyone have any experience with this?

I too have had this happen, been off bp meds since 3 wks post op. I felt it was a hydration thing, I had been out in the garage working and doing yard work. I could not bend over that afternoon without feeling like I was going to pass out.

could be low blood sugar. That can make you feel dizzy/ lightheaded especially when bending or standing up.