What is this brown lump on my cat's stomach? Should I worry?

It may just be a sebaceous cyst (a collection of oily debts under the skin) or a small area of inflammation from another cause. If its not painful and he isn't licking at it, I recommend that you make point once a week to measure it at home. If its changing in size over a couple of months or if it becomes bothersome, have it checked out at your vet. If your cat is too upset for a thorough exam, a little sedation may be recommended by your vet so that he/she can see what it is that you're seeing and make the appropriate recommendations. Thank for asking Petco Pet Education Center, formerly Petcoach!

This kind of lump/growth needs to be ideally assessed by your veterinarian to have a definitive and specific answer. Usually there are two ways your vet can do that a part from examining it directly during physical examination. A biopsy can be taken under local or general anesthetic, otherwise a smaller sample through a fine needle can be aspirated (this technique is called FNA= fine needle aspiration). Differentials include skin cysts, infections, benign or more sinister type of tumors. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

Hello there! A small lump or bubble under the skin that is not painful is probably nothing to be concerned about, but it should still be looked at by a vet at some point - especially if it gets larger, changes color, or if Tater starts scratching or bothering it. At his young age, I'm not terribly concerned about anything serious - a bug bite, foreign object, or a sebaceous cyst could be the culprit. Also, if he's had his vaccinations recently (within the last few weeks), this could also be a local vaccine reaction (which is also usually nothing to worry about and generally resolves in a month or so). The shoulder region is a common injection location. If anything changes or gets worse, a vet visit is in order. Otherwise, it's probably fine to keep an eye on it. Good luck, and I hope Tater keeps having a wonderful life! :)

Hello there and thank you for posting your question and picture. From the picture, it appears to be a benign skin mass that usually develop in older pets. These typically have this appearance and sometimes will not change in size or will increase in size. Most of these do not bother the animal and can be monitored. If you would like to confirm it is benign, your vet can perform additional tests on this mass. Please do not hesitate to contact me if you have any other questions or concerns. I am also available via text / phone consultation if needed.

Thanks for using Petco Pet Education Center, formerly Petcoach! This could be a benign or malignant growth. Based on its location, this could also be a mammary gland tumor which in most cases are malignant. This is often differentiated by a test called a fine needle aspirate (FNA) which is a pain free, inexpensive and easy procedure which in most cases will help reach a diagnosis. Sometimes a biopsy is needed for a definitive diagnosis. I recommend that you have her evaluated by your veterinarian for further assessment and treatment. I am really hoping for something benign. Good luck and have a good day!

I'm sorry to hear that Al has a skin lump that you found. Cats can develop growths that are benign (cysts, fatty deposits) or some that are concerning (skin cancers, abscesses). I would recommend he be evaluated by his regular veterinarian to determine what kind of mass it is, and whether or not it is potentially a problem for him. Good luck!

Whoops is right! It could be that Bailey has a cyst and it opened up internally. I would keep an eye on the area for now, and if the lump starts to appear again, I would have her seen by a vet. If it is a cyst, they can reoccur and it may need to be removed surgically to prevent it from filling back up.