I came home from work today and noticed that my cats mouth was red and slightly swollen. I immediately got nervous cause 2 weeks ago I brought home a kitten that had ringworm that I was unaware of. I only kept the kitten for one day and returned him because I didn't want me or my cat to catch it. Im not sure if I should be concerned with this or not. My boyfriend mentioned that she got into the trash as well so I'm thinking she could have just ate something or bit something that irritated her. Any thoughts?