I am 3.5 weeks post op and I too have severe left shoulder pain. I didn't always have this. I noticed it about a week ago. In fact, 2 days last week I thought I was suffering with an ear infection in my left ear, called my primary care physician and asked her to call in a Rx to the pharmacy. After 2 days of the antibiotics, somethng just told me to google ear pain, neck pain and shoulder pain post vsg. I found that it is probably due to gas. In my case, I get the ear pain, left shoulder pain when I have gotten full from eating. I burp a time or two & in the process of burping, I feel the pain in my shoulder/ neck area and in my left ear. So it could be digestion or gas in my opinion.