My dog has a sore on her nose. Is it ringworm or something serious?

Oh you are right, this could be ringworm. Do NOT touch it, ringworm is contagious to humans as well as other animals. Take Chloe into the vet. The vet can confirm it's ringworm, and can prescribe medication to treat it. If she has ringworm, you will have to disinfect your home, as ringworm spores can live up to 18 months in the home. I will put a link below on how to do it. I hope this helps. http://www.livestrong.com/article/49666-rid-home-ringworm/

Given that this sore on Trixy has grown, I would have her seen by the vet. The sore could be caused by a skin infection caused by bacteria or yeast, or it could be ringworm. The only way to know how to treat it is to have it diagnosed, and the vet is the person to make the correct diagnosis. Once a diagnosis has been made, the vet can prescribe treatment. I would take her into the vet in the next couple of days. I hope this helps, best of luck!

Thank you for submitting your question regarding Chloe. I recommend that she sees her veterinarian as she appears to have a mass on her nose. She will likely need a procedure known as a fine needle aspirate to diagnose the mass. There is a benign growth known as a histiocytoma that is common in young dogs. Unfortunately, it has the same outward appearance as a cancerous growth called a mast cell tumor. The sooner a diagnosis is made, then a treatment plan can be formulated. I hope this information helps!

This presentation could be due to a localized spot of skin infection (likely to be caused by bacteria or fungal infection). A check up, appropriate disinfection and possibly antibiotics/or antifungal medications (oral or topical ) are needed to solve the problem. Disinfection may be started at home with very diluted hibiscrub or betadine solutions. Buster collar may be useful as well to avoid any scratching (if any). 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. If this answer was helpful please let us know, this will be used to improve our service!

Thank you for posting the picture. It is really helpful. This lesion could be many things, and an examination with a veterinarian would be the first step toward a diagnosis and treatment plan. In my experience lesions such as this one in a young dog are usually either a histiocytoma, eosinophilic furunculosis, or ringworm. All of these can pop up quickly, and they are all treated differently. A histiocytoma is a benign tumor that will usually resolve within 4-6 weeks. The others need medications. A veterinarian can do a needle aspirate to help make the diagnosis and determine what the best treatment plan should be. Best of luck and I hope Tank improves soon. Thank you for using Pet Coach.

Ringworm does not normally become moist, a bacterial or yeast infection would be more likely. Your vet can take samples from the surface to determine the underlying cause and guide appropriate treatment

This doesn't look like anything specific. A burn is not likely. It could be an allergic reaction or it could be a histiocytoma tumor starting. I suggest you have her examined by your vet. It is not an emergency.