My mask would some days be tight and other days not so tight. I think with all the fluids I was forcing plus warm weather, I was retaining some fluid. I was told by the techs not to get a haircut while I was in treatment. My hair was very long and thick when I started treatment. They said if I cut my hair, my mask would be too loose. It is important that you can not move around while be treated. I would have lines some days but they would disappear in a couple of hours.