I'm not a medical professional, but I did struggle with bulimia for 10 years. In my experience, I found that the bloating in the face usually happens immediately after a purge and last for several hours. If you are not purging, it will eventually go back to normal.
I had years of treatment (therapists, anti-depressants, etc.) But for me, the only thing that broke the cycle was good diet and exercise. Taking care of my body took away the desire to binge and purge.
