I have PTSD and DID. As long as I actively use my coping tools for each of my triggers I have not major problems. For example being on a bus used to upset me because of the crowdedness and closeness. Now when I ride the bus I take with me my walkman and a casette with relaxation music and other songs that calm me. The minute I see the bus I put it, then get on the bus, put in my fare, take my day pass from the driver and take my seat. I sit up front whereI can see out the front window and I listen to my music. and as long as I continue to do this I have no problems with the crowdedness and closeness. Im relaxed and comfortable. I have been able to ride buses now without panic attacks and so on now for three years. The only way the problems around riding the bus come back is when I don't use my coping tools of relaxation music and seating where I can see out the front window.