My cat has a new dark blue/black spot on her butt. Should I worry?

It is difficult to say for sure from the picture as there is some discoloration artifacts on the photo. If the spot is not raised and is flat, it is likely a spot of increased color (hyperpigmentation). It could be the start of a melanoma so it would be wise to keep a close eye on this. If you would like a definitive answer, I would have your veterinarian take a look at Bella so that the most appropriate recommendations can be made. I hope this helps! Please let me know if you have any other questions or concerns and I would be more than happy to help you further.

Thank you for using Petco Pet Education Center, formerly Petcoach! I can see a flat, dark brown spot on Mewtwo's neck. It is somewhat concerning that the spot has gotten darker, so you should definitely keep an eye on it and have it checked out if it gets bigger or starts bleeding. Your vet can either remove the spot completely or take a needle and collect some cells from the area to send off to a lab. I hope this helps!

This appears to be just a change in color of the hair alone. No worries. THe haircoat in kittens often does change as they get older. As long as the skin itself looks good as you part the hair, there is no concern. : ) Thanks for visiting Petco Pet Education Center, formerly Petcoach! Take care. : )

It could be a normal color of her fur, but it could signal another problem. Without seeing her in person, I can't say for certain. I'd have her checked out by a vet for this problem. I hope this helps, Lola!

It’s difficult to say without doing an exam but these could be normal hair pigment changes. This sometimes will happens as a cat ages. I would also be concerned that something may be going on with the skin. I would make sure that it is just the hair that is discolored and the skin in that area look normal. I would be looking for an scabs, discoloration or redness of the skin and whether she is licking or bothered by those areas. If you are not sure, I would have your vet take a peak to ensure it looks normal. Your vet will be able to start her on the proper meds if needed. I hope this helps!

Hello. Cats can develop pigmentary spots similar to freckles in people. The spot do show up more often on the lips & the pink skin around the eyes. If you could post a very clear picture, I might be able to be a little more accurate, otherwise, just point the spot out to your vet at Tiffany's next visit. Thanks for using Petco Pet Education Center, formerly Petcoach.

We can sometimes see color changes in haircoat in animals as they age, or as a result of inflammation or trauma to the skin. If there are no lesions (redness, crusts or scabs, raised bumps, etc.) and your kitty is not bothering at the area by licking/scratching at it, I would just continue to observe the site. I would check it weekly for changes. If he begins to lose hair, starts licking/scratching, the skin looks red or irritated or other spots appear, then a vet exam is recommended.