question: Hello doctor, I never bothered to worry about this before but someone said I should see a doctor about this. The problem I have is that my facial muscles seem to always change shape when I am under stress. I remember someone once telling me he knew what was wrong with me. He said my face needs to breathe. Also when I shave and my face gets air my facial skin gets smoother in texture and fuller. I had not eaten in a while so I was starving and I went out to eat. I ordered a hot dog and by the time I finished eating I felt a surge of energy like my blood began to rush I think and my face popped and was a lot fuller. I think after that any time I would go to the toilet my stool would come out very dark and hard and messy. I do not know what could be the cause. So please could you help?