It is possible that you have an internal hemorrhoid or mild perianal hematoma though they normally only last a few days. If the sensation of having to defecate without actually eliminating feces continues it is important to consult a physician for further examination. Dried blood without other digestive symptoms may not be problematic though the fact that it is dried indicates it may originate higher in the digestive tract. This could be caused by many things the most severe of course being cancer. Fresh blood is excreted and does not have time to dry when it is lower in the intestinal tract. Please examine your other symptoms and seek further guidance. Try using an adult moist wipe to ensure cleanliness but not wipe as vigorously.