Why does my puppy have a red, itchy, hairless bump on his chest?

Question

My sharpei mix puppy developed a dime sized bump on his chest about a week ago. It started out as just a bump, it is now hairless and red I’m assuming due to him irritating it and trying to itch it. I am able to move it freely and it has not grown in size since it lost the fur, it has grown a bit since it appeared. I’m attaching a picture of it from around when it appeared and 2 from today. Pet's info: Dog | Shar Pei | Male | neutered | 8 months and 6 days old | 40 lbs

Dr. Elizabeth · Accepted Answer

I recommend to have Cash examined by the veterinarian. Skin masses can be many things but red raised masses are especially concerning for a skin cancer called a Mast Cell tumor. This mass could also be a benign Histiocytoma. Unfortunately, they look alike. Your veterinarian will need to collect a sample of cell to examine under the microscope to determine what this is and if further treatment is needed. Protect the area from itching with a dog shirt and he shoudl wear an elizabethan collar at all times if he can reach the area. If it is a Histiocytoma, sometimes inject steroid into the lesion can cause it to shrink and stop itching. Have this checked out soon.

Why does my puppy have a red, itchy, hairless bump on his chest?

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