Bad kidneys can be hot compresses on the waist, if there is no obvious skin breakage on the surface of the waist, you can apply hot compresses on the waist, but it is not very useful for the treatment of kidney disease. Kidney bad need to clarify exactly how bad, the simplest can check the urine routine, 24 hours urine protein quantitative, renal function, renal ultrasound and so on these tests, if there is a problem need to further check the immunoglobulin, complement, blood glucose, lipids, autoantibodies and other tests to clarify the cause of the disease, need to carry out a renal biopsy to clarify the type of pathology, and then according to the type of pathology to choose the appropriate treatment program. What you said about the kidney is not good, may be from the perspective of traditional Chinese medicine, this time is mainly pay attention to the waist to keep warm, but the hot compress can only play a superficial role, the inner kidney can not play much of a role. This time should be carried out under the guidance of a traditional Chinese medicine doctor, including the regulation of traditional Chinese medicine, as well as moxibustion and other integrated treatment.