I think many of us also use denial as a defense mechanism against confronting and feeling difficult emotions. However, I think the use of physical symptoms is more effective as it keeps us so fixated on the body that other thoughts and emotions are not likely to intrude. I have personally had difficult emotions break through denial, where I found myself reacting emotionally to a trigger, but with no conscious awareness of why. Once I was able to make to the connection, my physical symptoms became worse and I developed new ones to keep me from feeling the emotions.