What I don't understand is how all the symptoms we feel can be real, like real pain, when we are physically healthy? I often get odd pains and pressures in my head, sometimes quick sharp pains, sometimes dull pains, and my psychiatrist says it's a common anxiety symptom. But why? Why is the pain so real, if there isn't any illness inside our bodies, in my case, my head? Why is this happening, what does it have to do with our anxiety?