Learning about Dog Tail Injuries and How They Happen Tail injuries commonly occur from repetitive enthusiastic wagging, unexpected hits against solid objects, and occasional bites or abrasions during games or exercise. In many cases, this condition results from repeated trauma to the tail tip, causing splits, bleeding and ongoing irritation. https://brightring763.humor-blog.com/37169220/the-growing-craze-about-the-happy-tail-syndrome-treatment