I'm a US person. While going through aggressive cancer treatment and concomitant depression, I was encouraged by my caregivers to smile as much as possible to

I'm a US person. While going through aggressive cancer treatment and concomitant depression, I was encouraged by my caregivers to smile as much as possible to elevate my mood. They even encouraged me practice smiling while alone. N=1, but this did seem to help. It seemed to lower my stress when around other people, and I noticed that they would be smiling more too (although this may just be because I was finally noticing something that was going on around me.) Otherwise I have "resting porg face".