Q. My dog has a Knott on the side of his rectum at the tip of this bump is bleeding my other dogs keep trying to lick it, I hav tried pryoxide an bactine
DESTINI R. HOLLOWAY, DVM
A. This sounds like a skin mass. If t is bleeding then hydrogen peroxide can make this worse by causing dying off of vital tissue inside the open wound, so I wouldn't recommend it. Iodine or chlorhexidine are much safer products to use.
For masses I highly recommend you schedule an appointment with your vet so that they can come up with an effective treatment plan for this, including possible removal of the mass entirely. Also if it is a mass having it removed and analyzed is beneficial so you can identify this as either benign or cancerous.