My dog's purple stomach growth came off and bled. Is this normal?

This looks very abnormal. I would be worried about this and I think you should have him seen by a vet. Could be ringworm, a staph bacterial infection, a spider (or other insect) bite, an autoimmune disease or the start of a cancerous lesion.

This may be an abscess, a cyst or a tumor. You should have it examined by your veterinarian, as it is not possible to distinguish these by just looking at a photo. An abscess can usually be treated with antibiotics and/or be lanced, and a cyst can be evacuated. To identify a tumor, your vet may want to do a fine needle aspirate (he takes some material from the bump with a needle and then looks at it under the microscope) to determine whether the mass is concerning.

This looks like it could be a cyst or a skin tumor like a hemangioma. I find that once a skin growth ruptures it tends to happen again, so I would definitely recommend making an appointment to see your veterinarian. They will probably recommend surgically removing this growth.

I'm glad to hear that Ivy doesn't seem to be bothered by this lesion, despite how inflamed and irritated it appears. While it's impossible to say definitively what the cause of this lesion is without further diagnostics, I can say that it's possible that this could be an irritated insect bite, or a benign or malignant mass. Given the irregular surface of this lesion, I think a bite/sting is unlikely, but the possibility shouldn't be ignored. Since it's so red and obvious, we have to assume that it popped up pretty quickly since you're just noticing it. As a result, I do think that you should have this checked out by your vet in person in the coming week. After an exam, your vet will likely want to perform a fine needle aspirate, where they'll use a needle to draw out a few cells for microscopic evaluation. That will help them to determine if this is more of an inflammatory/infectious issue rather than a more aggressive lesion. In the meantime, be sure to keep a close eye on Ivy. If she starts to lick this area at all, put an e-collar (cone) on her, as the licking will only cause further irritation. I hope that everything goes well!

I recommend you put some folded gauze on the lesion to stop the bleeding and tape that on. You should have this examined by your veterinarian, as there are various conditions that can cause this: 1) a coagulation disorder, 2) cutaneous hemangiosarcoma) 3) a severe bruise 4) other trauma. Depending on the size of the blood vessel that is bleeding, or the cause this may be dangerous.

This mass certainly looks concerning. As it is growing, there is a suspicion that it is likely a malignant mass. I suggest you schedule an appointment with your veterinarian for an exam and a so-called Fine Needle Aspiration (FNA) where your veterinarian takes a small amount of tissue from the mass with a fine needle. This is usually not painful and will help determine the type of mass and whether it needs to be removed surgically.

That area could be a ruptured abscess, a ruptured cyst or the previous home of a worm larvae. You can continue treating it like you are. Make sure Eleven wears and elizabethan collar at all times to prevent any licking which could make it worse. If the lesion is not healing within one week or is getting worse at any a point, have her examined by the veterinarian. I hope this helps and please feel free to post any additional questions.