No or little sweating in the lower body is a sign of abnormal sweating in diabetic autonomic neuropathy. There are signs of yin deficiency, which makes your body hot. As well as the effects caused by plant nerve dysfunction. So, what tests should be done in patients with diabetic autonomic neuropathy causing no or little sweating in the lower part of the body? The following is a brief introduction: I. Neuroelectromyography examination Neuroelectromyography examination has a certain value for the diagnosis of diabetic peripheral neuropathy, and can detect subclinical nerve damage, which has obvious changes in the early stage of diabetes, even before the appearance of clinical symptoms, so it has early diagnostic value. Second, the cardiovascular autonomic nerve injury related tests: 1, heart rate at rest: cardiovascular system of vegetative neuropathy at rest heart rate more than 90 times / min. 2, the difference in heart rate per minute during deep breathing: patient lying flat, first training six deep breaths per minute, record the maximum and minimum heart beat spacing (R-R interval) during single deep inspiration and deep exhalation on the II-lead ECG, calculate the difference in heart rate per minute during deep exhalation and deep inspiration (respiratory difference), normal people under 50 years old have a respiratory difference greater than 15 times/minute, 50 to 60 years old is greater than 10 ～If it is less than 10 times/minute, it will be abnormal. 3, the lack of action response index: ask the patient to inhale deeply and then cover the nose and close the mouth to exhale forcefully, that is, the lack of action for 15 seconds, and then relax the natural exhalation for 10 seconds, while recording the ECG, determine the ratio of the maximum R-R interval after the lack of action and the minimum R-R interval when the lack of action, as the lack of action response index. It should be greater than or equal to 1.21 in normal individuals, and abnormal if it is less than or equal to 1.10.