I noticed today that one of my guinea pigs (Age: 4 years and 4 months) was facing difficulties in chewing his food. He's been active and asking for food as usual. So, I looked inside his mouth and noticed a little sore that looked white and red on his lower lip on the inside which made it difficut for him to chew. He's able to eat his dry food as usual because that doesn't require him to use his front teeth but veggies have been difficult for him to chew since today morning. Could someone let me know if this is a cause for concern or if it is like a heat boil or sore that humans get which goes away on its own? Going to the vet in the middle of COVID has been tough but please let me know what I can do and if the vet visit is necessary.
You want to start weighing him daily right now to know for sure if he is eating enough. Other complications happen if a guinea pig starts losing weight and does not eat enough hay to keep its teeth in check.
But since there no white visible right now, I don't know if its a virus. If he did bite the inside of his mouth, would it heal quickly?