At the beginning of this year among lots of other problems I noticed that I had difficulty opening my mouth. In April I was diagnosed with Scleroderma and Polymyositis. It was then I discovered the mouth problem was caused by Scleroderma. Since then I exercise my mouth and face, but what I would like to know is how wide should we be able to open our mouth. It is something I never needed to know before. At the beginning I could get 2 fingers in my open mouth now it is 3. This might seem a silly question but what experience have other people had?