I just started taking 1000 mg of metformin about a week ago, and i was fine until today when my face turned bright red and felt like it was on fire. It subsided throughout the day but happened again when i took my second dose today. i know this can be a side effect of Metformin but i wondering if anybody has had a problem like this and does it go away? ill be calling the dr tomorrow to ask him. id really hate to stop the Metformin after only a week.