My cat has a hard bump on his nose, not bothering him. Should I worry?

First of all Purrito is one handsome little guy! The bump on his nose is fairly prominent and also appears to be a bit red/inflamed through the fur. Cats do not often get as many lumps and bumps as dogs do, so when one pops up, we take a bit more notice. Some of the common causes of bumps can include benign or malignant masses, abscesses, granulomas, or in this case, even nasal cavity infections or tumors. The only way to determine the cause of this bump is through further testing, either including a needle aspirate (a needle draws out some cells for microscopic evaluation), x-rays, or even a CT scan or MRI of the head. Even though Purrito does not seem to be bothered by this bump, I still recommend taking him to the vet for further evaluation since bumps do not often go away on their own. It's better to address these issues before they grow larger and become potentially more problematic. I hope this helps and that all goes well!