10 years ago i had a gastric bypass, i was told to take b12 sublingually. after a couples of years i ignored the indications having b12 ocasionally only. a year ago i devoloped pain all over my body, specially heels, ankles, gluteous area, sharp burning -like pain when flexing knees, shoulders, numbes and tingling at hands, leg and feet cramps, waking down stairs is painful. my doctor told me i had fibromialgia. (TESTED NEGATIVE TO LUPUS, RHEUMATIOD ARTHRITIS, INFLAMATION,) received treatment with cymbalta and lirica but no help. cortisone steroids relived pain, only. is it possible that the problem started with the b12 deficiency? i resently started b12 injection one month ago.