At the early stage of the disease, red spots or spots often appear from the base of the tail stalk to the tail end, the surrounding tissues are congested and inflamed, and the epidermis is slightly gray. When the course of the disease is too long, a sore-like lesion is formed, and a large number of pathogenic bacteria and sundries are often attached to the lesion. In severe cases, muscle necrosis occurs in the focus, coccyx is exposed, the patient loses appetite or stops eating, the activity ability is obviously weakened, the tail wags weakly, and he will die soon. Treatment method It is found that when the Hexagonal Newt suffers from tail rot, it should be kept in isolation in time. If it is not saved separately, it will cause endless trouble and may infect other individuals. First, soak the diseased salamander 15 ~ 25 ppm in potassium permanganate or 0.3 ~ 0.5 ppm malachite green solution for 20min, and thoroughly clean the wound surface attachments, then apply anti-inflammatory drugs such as Xiaozhilong ointment or sulfur ointment to the affected area, once a day, and it can be cured for 4 ~ 7 days. 2 ~ 3g of chloramphenicol and 2g of chloramphenicol powder+VC2g+VE2g+VB2g (per kg of body weight) were used, and the above drugs were evenly mixed into the bait and fed for 3 ~ 4 days.