Cyst Burst On Dog. In addition to fatty tumors and cancerous lumps there are a few other possible causes of sudden lumps on dogs. Keep monitoring the skin around the ruptured cyst since ruptured or burst cysts are vulnerable to infection.
The contents of the cyst vary widely, depending on the type. But, you need to make sure all the cyst material is out or it will not heal up. Cysts in dogs and cats: