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My dog has red spots and losing hair. What's causing this skin issue?

Updated On September 23rd, 2025

Pet's info: Dog | American Pit Bull Terrier | Male | neutered | 55 lbs

My pup has these dime size red spots that all the hair has has fell off what is this

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1 Answer

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Answered By Alysia Van Scoy, DVM

Veterinarian

Published on October 22nd, 2017

Thanks for the pictures. By looking at them, there seems to be a different look to some of them. The one on the nose appears raised, and has me concerned that it is skin mass. It could just be the picture angle... Hairloss in dogs is usually related to mites, or allergies. I would recommend taking Parker into a veterinarian. They can see if the lesions are related to each other. They will also do some diagnostics such as a skin scrape to check for mites, skin cytology to check for secondary infections and possibly a fungal culture. If the nose lesion is actually a mass, they will most likely do a cytology (stick a needle in it, push cells on a slide, stain slide and look at them under a microscope). If it turns out to be allergies, please realize that allergies (just like humans) can't be cured, only controlled. It may take a few different treatments to get them under control. Hope Parker feels better soon! Thanks for reaching out to Petco Pet Education Center, formerly Petcoach!

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