My dog's skin lump changed, now red, sore, and itchy. What's wrong?

This looks like a little skin wart which are usually nothing to worry about. It doesn't look red or infected at the moment. It could be that she has an underlying skin allergy that is causing the itching. If you are worried you should take her to the vet for an examination. Alternatively you could try giving her a daily antihistamine to see if that settles the itch.

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!

It could be a small cyst, pustule/papule, or possibly a Histiocytoma which is a benign mass that is common in young dogs. Since it is getting more red, she should be examined by a vet to determine the cause. The vet may want to aspirate it and examine the contents under a microscope. She may need an antibiotic, anti-inflammatory, it may need to be removed, or just monitored (histiocytomas typically resolve with no treatment). You could use an over the counter spray, like Vetricyn, and see if that helps relieve any redness or discomfort.

Thank you for contacting Petco Pet Education Center, formerly Petcoach with your question about Frank. This lump could have become red and swollen from him scratching at it, and it may now be irritated. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of its cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options if needed. I would take him into a vet tomorrow to get the lump looked at and to get the cause of his scratching diagnosed so he can be treated. Best of luck.

I can see that Alfie has a small lump, that appears raised and hairless on his skin. This can be an infection, buried tick or healing wound - unfortunately, I am unable to say exactly what this is from a photo. I recommend having Alfie seen by a vet, especially if this is a tick, to have it removed and antibiotics prescribed. In the meantime, you can shave he area if you have a clipper at home and keep it as clean as possible, an E-collar or "cone" can help prevent Alfie from licking the area and causing further trauma. I hope this helps and that all is well with Alfie!

This could just be a bite or spot that has caused a bit of allergic reaction in the skin. If it is an area of allergy or infection it will resolve with time. If it doesn't go away it is a mass in the skin, such tumours can be benign or cancerous but need to be tested to know.

This lump on Alfie could be a cyst, an abscess, a benign tumor, or a malignant tumor. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I would have Alfie seen by a vet tomorrow to have this lump examined and diagnosed so it can be treated as needed.