What could be wrong with my dog his right side of his face is swollen and there is some kind of liquid coming out

My dog is about 7yrs old she is a Lhasa Apso her name is COOKIE .. Ive had her since she was a puppy this is really stressing me out. I went on vacation and left  her with my aunt when i came back the next day when i took her home i noticed the side of her face was swollen and it also smelled funny- like some kind of odor. so i took a closer look and there was some kind of liquid oozing out of the area that was swollen so i gently but the hair around the area (he hair is long) and gave her a bath next day it dried out and it was fine that was 2 weeks ago now it returned today what could thsi be? thanks

[anemay]

usually anything that smells funny is a sign of infection,needs to be seen by a vet ASAP, could be an skin issue or even from inside of her mouth , like teeth. See vet ASAP