Understanding Tail Injuries And What Causes Them Injuries to a dog’s tail often develop from frequent enthusiastic wagging, occasional bumps against hard surfaces, and sometimes scratches or nips caused during play. In many cases, happy tail syndrome results from repeated trauma to the tail tip, causing persistent bleeding and soreness. https://visionaryunit541.eedblog.com/38778888/what-might-be-next-in-the-happy-tail-syndrome-treatment