Blood in Stool and itching

Hello, my 8 year old yellow lab has been itching his back by rolling on the carpet. He will do this quite a bit that I think it's not normal. He also has had some fresh blood in his stool yesterday and today. Any help with what this could be would be appreciated 

Hello!  We obviously cannot diagnose from photos, but in general one of the more common causes of scratching (rolling being, as you suggest, a common manifestation of it) is fleas and a common cause of small amounts of blood in faeces may be worms.  Labs like to get to know things by tasting them, so in general it seems like a good idea to check his parasitic status with your vet or nurse.   Obviously there are many other possible reasons for both signs (mites, allergies, behavioural, for the itching and anything from mild dietary upsets to foreign bodies (mild or severe) to polyps or diarrhoea or cancer or anal gland disease or bacterial or viral disease (mild or otherwise) for the fresh blood in faeces) so a consultation to discuss it may prove a good idea, especially if it continues or other signs of illness are observed.  As a one off in a perfectly healthy patient, the faeces might sometimes be regarded 'one of those things,' but as a rule, solid brown faeces of a certain size are regarded as normal. Best of luck and please do let us know if there are any developments!