What's this wet, greenish sore on my dog's face with hair loss?

Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Poor Ninja! I can not see the skin well in the pictures due to all the hair. I am not seeing an open wound but more of a sore. If the area is flat, red, moist and weeping it is likely a hot spot. Hot spots are superficial skin infections that occur secondary to allergies, scratching and excessively moist fur (like after a bath or swimming). They crop up very quickly and get larger just as quick. I treat hot spots by shaving all the fur away, having owners use an E-collar or T-shirt to prevent further scratching and I prescribe a course of oral antibiotics and tapering course of steroids along with a topical spray. Most hot spots with this treatment heal with in 5 days. I would make an appointment with your Vet. I wish you the best!

Ouch, poor Chewie! This lesion looks most consistent with a hot spot (moist dermatitis). Given the location, I would also be concerned that he created the lesion from trying to scratch his ears from an ear infection. If you have clippers on hand, you can clip the hair around the skin lesion and then clean it with an antiseptic soap, such as chlorhexidine or betadine. It is worth taking a trip to the vet to have his skin and ears evaluated. Until you can take Chewie to the vet, keep an e-collar on him to prevent further skin damage. I hope that all goes well!

I am sorry to hear about Lexi. While it is impossible to provide a diagnosis from a photo, it looks like Lexi could be suffering from acute moist pyoderma, also known as a "hot spot". These are areas of superficial skin infection and can be quite painful. You can read more about them here: http://www.veterinarypartner.com/Content.plx?P=A&S=0&C=0&A=2714. I would recommend a visit to your vet. They can shave the area with clippers, clean the skin and may prescribe either topical treatment such as a medicated shampoo or spray, or oral antibiotics/anti-inflammatory medication.

This is very concerning and appears to be a moist dermatitis, likely caused by a bacterial infection. Your dog needs to be seen by a veterinarian asap for an exam, clean up of the lesion which includes shaving the hair off all the way into healthy areas of the skin to see the extent, a possible skin swab and, depending on the diagnosis, prescription antibiotics in tablet or ointment form.

Hey! I would recommend either taking to a veterinarian or clipping the hair. It looks like what we refer to as a hot spot or moist pyoderma. This is a superficial skin infection. You can try medicated shampoos but might need antibiotics from a vet. Most of the time this happens due to an allergy and itchy skin.

Looks like a hot spot, skin infection. These are itchy and painful. They have to be shaved, cleaned by your veterinarian and then be placed on antibiotics. He may need a steroid injection as well. If your veterinarian isn't open tomorrow, id go to ER cause these are uncomfortable.

This sounds like it could be a hot spot or superficial bacterial skin infection. Most of the time hot spots are treated with antibiotics and sometimes some prescription topical medications. I'd recommend making an appointment with your veterinarian.