answered question 6/6/2009 My Dog Is Scratching In His Anal Area By Rubbing His Anus On A Rug Or The Concrete, Which Is Starting To Bleed From His Scratching. What Can We Give Him To Fix This? First you need to check his stool, are there any white looking objects in it, kind of like rice or small thins objects. If so, the dog has worms. You can buy over the counter meds at pet stores. If stool looks ok you need to take him to the Vet.