had been previously on antibiotics for cough (3 wks ago)
Yesterday I noticed a raised mass about the size of a dime around the side of his mouth at the end of his whiskers. At that time it had hair. Since yesterday,it has increased in size (more in height than width)an looks similar to a large wart. It is not red or sore and has a rough surface. It is not on the inside of his mouth. Is this serious?