My cat has a drooling, crusty mouth sore with pus. Should I see a vet?

I am very sorry that Kitty has his sore near her lip. Thank you for proving pictures, it is difficult to know precisely what caused this lesion it may have been a cat scratch, a traumatic puncture from for example a fence, or possible a primary skin like feline acne, or allergic disease. At this stage it appears to be slightly crusted and inflamed and I would suggest a trip to the veterinarian. The vet will most likely clean the wound and debris any necrotic material. The vet may also send home pain relief, anti inflammatory medications and / or antibiotics. The vet will also be able examine the area and reach a diagnosis. Best of luck to you both and thank you for using Petco Pet Education Center, formerly Petcoach.

Thank you for submitting your question regarding Sam. Yes, I recommend that he sees his veterinarian. The wound could be the result of a condition known as an indolent ulcer. If so, it will require treatment before it progresses any more. This condition is typically the result of an allergy to something in the environment, diet or even fleas. I hope this information helps!

It is difficult to tell form the picture alone what is going on with your cat's lips unfortunately. It almost looks like she/he has a sore or even infection in her/his whiskers and commissure of the mouth. I would recommend you take your cat to your vet for an exam. She/he may need antibiotics to resolve this and possibly pain medication is she/he is is uncomfortable. I would also be concerned there may be sores in the mouth that need to be addressed if you are seeing them along the outside. It is possible your cat licked something toxic or caustic causing these problems. I would look around your home to see if there is anything she/he could have gotten in to. I hope your cat improves quickly!

The pictures attached this time! That sore on Bear's lip looks pretty red and sore. I would be concerned that it could possibly be infected. Likely it's hard to get that to heal given he will probably be licking it with his tongue a lot since it will bother him. I would have him seen by a vet. He will need oral antibiotics if there is an infection to help the sore heal correctly. I hope this helps!

Thank you for submitting your question regarding Oreo. I recommend that he sees his veterinarian. His upper lip appears very sore. He could have a skin infection or have the beginnings of a disease known as indolent ulcers. This is a serious condition that is typically triggered by an allergy. His veterinarian will examine him and may recommend a skin biopsy. I hope this information helps!

Poor Rb. I would gently clean the wound with warm water and antiseptic soap. Keep the wound clean and dry, and monitor it for signs of infection. If you see redness, swelling, warmth to the touch, or pus, then it is infected and he will need to see the vet for antibiotics to treat it.

Hi there. That wound on Phish could be a big pustule from feline acne or it could also be from a tooth root abscess. I would soak the area with warm water Epsom salt compresses twice daily for the next few days. If he is not improving then he should be evaluated by a veterinarian as soon as possible. Often antibiotics are needed in cases of feline acne. Best of luck and thank you for using Pet Coach.