My dog has a sore for 3 days. Is it a pimple or serious?

I don't think this is a serious issue at this point. It looks like a pustule/pimple which may be from an ingrown hair or she may have had an insect bite. You can use these medicated pads on the affected area once a day. If for some reason it does not appear to be going away, or if she gets more lesions, then I would say a vet visit would be warranted. https://worldtails.securevetsource.com/itemView/view/198944_HomeDelivery.pml?productId=117958

This looks like a small pustule - like a pimple from an infected hair follicle. I suggest you use these medicated pads on that lesion 1-2 times per day. If after a few days it does not start to look better OR it looks worse, then he needs to see a vet. ( https://www.allivet.com/p-5393-douxo-chlorhexidine-3-ps-pads-for-dogs-and-cats-30.aspx?SearchTerm=duoxo%20pad+Auto )

This looks like a mild skin infection/inflammation. I suggest you use these medicated pads on it. If after about a week to 10 days of use, the lesion is not better or looks worse then your vet should examine him. ( https://www.allivet.com/p-5393-douxo-chlorhexidine-3-ps-pads-for-dogs-and-cats-30.aspx )

I am sorry to hear about your concern for Saki. It is a bit difficult to really see the lesion in these photos. If it looks like a whitehead pimple (has a whitish colored center) you can try cleaning it with an antibacterial soap such as Hibiclens (available at most drug stores) and applying a topical antibiotic ointment twice daily. If it is not resolving within a week or if it is increasing in size a vet visit is recommended. You can also try warm compresses for 15 minutes a few times a day if it looks like it might come to a head and drain. If it is more of a solid mass then it could be a small tumor. We can have benign (non harmful) tumors of the skin, but with any potential tumor it is safest to have your vet examine the area.

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! The area in the picture looks like an area of what I would call excoriation or skin irritation usually seen when a dog scratches an area extensively due to itching. The yellowish area can be a pimple or what we call a pustule (a pimple containing pus). Pimples and pustules are usually raised lesions, extending up from the skin. It's a little difficult making out much detail in the picture. Sometimes damaged areas of skin turn yellowish like that and are usually flat in appearance, not raised up like a pimple/pustule. I hope this helps.

Hello, Thanks for the good picture. I agree that it does look like a solitary pimple, very well could be from an insect sting initially. I would just monitor this for now. If it spreads into many pimples, a larger sore, or an itchy rash, those would be reasons to have him seen by his veterinarian to ensure he doesn't have a skin infection that requires treatment. You can use a warm compress with saline or epsom salt water on the area for a few minutes twice per day. Otherwise, don't apply any ointments and just let it stay dry and open to air. I hope this helps. Thanks for using Petco Pet Education Center, formerly Petcoach.

It looks like a pimple, a minor skin infection. You can use a Benzoyl peroxide topical cream or an antiseptic cream in order to help it resolve quicker, but otherwise it should resolve itself without treatment.