Most people can't escape the holidays without feeling a little stressed out. The stress comes from all the things people commonly do during the holidays: over eating, drinking too much, holiday travel or dealing with family expectations, according to University of Colorado at Boulder psychiatrist Roianne Ahn. "Whenever people get stuck in the glitziness of the holidays, or the excessiveness, they can kind of get ramped up and lose their impulse control," said Ahn. "They overspend, overeat and go into an excess behavioral mode. That can be a problem."