A. I've may have licked a toxic/ chemical and the signs you are describing may be compatible with a chemical burn injury. I would recommend to take him to your veterinarian to be checked and have appropriate treatment as soon as possible. The wound may get infected and if your cat stops eating may need supportive treatment. Pain killers and anti- inflammatory medications are usually given as well.
The chemical may have affected all his oral cavity and the oesophagus as well.
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