That is really good news! So glad to hear it's nothing serious. One suggestion though, which someone else here mentioned early on. If you don't use stainless steel bowls for Miko's food and water, try changing to them. We've had two dogs that had lip reactions to plastic or ceramic and stainless cleared them up. It may not be the reason, but just in case....can't hurt!
Most of our dishes are ceramic or stainless steel but I did have one plastic water dish outside so I changed that to stainless today. Thanks for the suggestion.