Calf nerve block surgery, also known as calf nerve dissection thin leg surgery, the surgery in July 30, 2021, the Office of the National Health Council has issued a notice: prohibit the application of this surgery in the clinic. There are mainly the following risks: 1, early recovery from surgery, patients often feel calf weakness, soreness, walking time is too long easy to feel fatigue, going up and down the stairs is not as good as before, 3 months or so, basically back to normal; traumatic injuries to the motor nerve trunk leading to long-term damage to the motor function is rare; 2, postoperative examination of the patient’s lower limb skin numbness or dullness of sensation, check the ankle, knee joints flexion and extension of the activities, and timely detection of the Whether there is any accidental injury to the nerve branch of the piriformis muscle and the cutaneous nerve during the operation, resulting in impairment of the movement function and skin sensation of the calf; 3, obvious scar proliferation and pigmentation: the emergence of this complication is closely related to the patient’s physical condition, postoperative care, and the operator’s suture method; 4, mild asymmetry of the size of the calf bilaterally: it may be due to the multiple branches of the medial cephalic nerve, which is not completely cut off; 5, compensatory hypertrophy of piriformis muscle; 5, compensatory hypertrophy of piriformis muscle. hypertrophy. It is also clearly stated in the notification issued by the National Health and Wellness Commission that the surgery lacks scientific basis and evidence-based medical evidence, and directly leads to irreversible nerve damage and lower limb motor dysfunction, and there are serious safety issues, which is contrary to the principles of medical ethics. In accordance with the relevant provisions of the Measures for the Administration of the Clinical Application of Medical Technology (NHHC Decree No. 1), based on the opinion of the argumentation, the application of the “Calf Nerve Dissection and Leg Reduction Surgery” to clinical practice is prohibited as of the date of the issuance of this notice.