Puppy has red, crusty neck lump after vaccine. When to see vet?

Question

My puppy is 7 weeks old and he has a bump or lump on the back of his neck. It looks red and crusty when I look at it. He had his first vaccine 2 days ago and I know that lumps can be caused after a vaccine but its red and crusty like a scab over the bump. I can attach a photo but it's kinda hard to tell what it might be. It could just be that he had a reaction or he scratched himself and that might be what caused the scab. Just wanted to see what you recommend and if I should see a vet or wait? Pet's info: Dog | Mixed Breed | Male | unneutered | 1 month and 13 days old | 0 lbs

Dr. Strydom, DVM · Accepted Answer

You're right it is hard to tell from the photos. I think it looks more like mange. The unfortunate thing is that many skin issues look similar so it is often difficult to tell exactly what it is just by looking at it. I can say that I have not had a vaccine reaction look that way so I think that is less likely. Also, vets don't usually use the back of the neck for vaccinating anymore - are you sure the vaccine was given there? I don't think it's an emergency. I would recommend putting some Neosporin on it for now and then just bring it up at the next vet exam. He should be due for booster vaccines in a few weeks. If it starts looking worse or it is bothering him then I would take him in to see the vet sooner. Hope this helps. Best wishes.

Puppy has red, crusty neck lump after vaccine. When to see vet?

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