Why does my dog have a hard brown lump protruding from his skin?

A small area like this could be inflammation as a result of an insect bite or wound, inflammation as a result of bacterial infection (though usually we would see more then just one lump) or a growth/tumor of the skin (we can have benign growths that don't cause any health concerns or growths that are malignant and require removal). Unfortunately without an exam and a sample (taken with a needle most often ) we can't tell you for certain the cause. If it isn't bothering your dog I would continue to monitor it daily. It is from an insect bite or wound it should resolve over the next couple weeks. If it is still there in a month or is increasing in size or changing appearance then a vet visit to investigate the area further is warranted.

Hello, thank you for using PetCoach. Chances are that this is a sebaceous cyst. Sebaceous cysts are usually harmless, sack-like growths with a lining that is not cancerous. In dogs, most cysts develop from hair follicles. These cysts typically appear as single, clearly defined, firm or soft lumps located in the skin or just beneath it. They are often between 0.5 to 5 centimetres in size and may sometimes have a bluish colour. A cyst can release a thick, gray-to-yellow-brown cheesy substance if it bursts. Other terms for sebaceous cysts in dogs include infundibular or follicular cysts. The lump needs to have a fine needle aspirate (FNA)/cytology to be sure of that diagnosis. Here is a link about the procedure and why it is done. It does not require anesthesia. ( https://vcahospitals.com/know-your-pet/cytology-fine-needle-aspiration-fna ) If it is a sebaceous cyst, it will be very obvious once the vet introduces the needle into the lump. Hope this helps. Best wishes.

This looks like a skin mass or tumor. Sometimes a benign growth or cyst can have some material inside that you can squeeze out like this. Unfortunately it also could be a malignant mass. I would recommend having your vet take a look - they may want to take a sample using a small needle to help determine what it is.

It is very hard without seeing it, however what you are describing sounds most like a wart or cyst, but you can't rule out other possibilities like tumors. If it is not growing or bugging him then just get to the vet when you can for a quick check.

Although a picture would help to define better the nature of it, generally speaking, 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. 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.

Thanks for using Petco Pet Education Center, formerly Petcoach! I do recommend all abnormal growths be evaluated by a veterinarian to determine if they are benign (non-cancerous) or not. Skin growths can be due to a variety of reasons, including allergies, infection, allergies, warts, or true tumors. What type of growth it is typically can be evaluated by a needle sample by your veterinarian, and then a treatment plan can be made, if needed. Good luck!

Thanks for sending the picture! It appears to be a wart like growth with a small scab on top. These are common in small breed dogs. If it grows or changes rapidly, then I would still have her veterinarian check it out. Otherwise I do not suspect it will be a problem for her. You can try to clean the scab off for her. Good luck!