(Disclaimer: This article is only for popular science purposes, in order to protect the patient’s privacy, the relevant information in the following content has been processed) Abstract: The patient, Zhang Lao Han, was admitted to the hospital for treatment of “pain in the right lower limb with a feeling of coldness for more than 20 days”, and his family members indicated that the patient had pain in the right lower leg with a feeling of coldness for more than 20 days without any obvious cause, which was obvious after activity and not significantly relieved after bed rest. There was no obvious relief after bed rest. Ultrasound of the lower limb arteries showed slow blood flow in the middle section of the right superficial femoral artery, and occlusion of the right anterior tibial artery and peroneal artery, which was considered to be lower limb arterial stenosis. After interventional surgery, the pain and coldness in the lower limbs improved significantly, and the patient was in good condition. Basic information] Male, 73 years old [Disease type] Lower limb arterial stenosis [Hospital] Inner Mongolia Xing’anmeng People’s Hospital [Date of consultation] May 2022 [Treatment plan] Surgery (balloon dilatation stent implantation, balloon dilatation angioplasty) + medication (aspirin enteric-coated tablets, atorvastatin calcium tablets, nifedipine tablets) [Treatment cycle] 12 days of hospitalization, with regular outpatient follow-up [Treatment effect] The patient had pain and cold sensation in lower limb, and was in good condition. Treatment effect] Lower limb pain and coldness improved significantly, and the patient was in good condition. I. Initial Consultation In May 2022, the patient, Zhang Laohan, came to our hospital under the leadership of his family, who said that the patient had suffered from cerebral infarction resulting in hemiparesis of the right limb and aphasia, and that he found that the skin temperature of his right lower limb and foot had decreased more than 20 days ago. At first, the family did not pay attention to it, but after rest and physical therapy, the pain was not relieved, so the patient came to our hospital today. Outpatient examination revealed that the patient’s right femoral artery was pulsating well, and the right popliteal, dorsalis pedis, and posterior tibial arteries were not palpable. The skin temperature of the right lower leg was significantly lower than that of the opposite side, and the skin color was cyanotic, with poor peripheral circulation. Possible lower limb arterial stenosis, after explaining the condition to the family, the family admitted the patient to the hospital. After admission, the patient completed the relevant auxiliary examinations, and the CTA of the lower limb arteries showed occlusion of the middle and lower part of the right superficial femoral artery, the anterior tibial artery and the peroneal artery, and localized severe stenosis of the deep femoral artery and the popliteal artery. Other examinations did not reveal any obvious contraindications to surgery. After discussing the patient’s condition, surgical plan, and the possibility of intraoperative and postoperative complications, the family agreed to undergo surgery. The operation was carried out by minimally invasive interventional therapy, and the right femoral artery was punctured in passing, and the location and degree of arterial lesions were clarified after imaging. The guide wire catheter passed through the lesion site smoothly, and balloon dilatation stenting was performed in the superficial femoral artery, while the artery below the knee was opened, and balloon dilatation angioplasty was performed in the anterior tibial artery and peroneal artery. After the operation, the right groin puncture point was pressurized with a salt bag for 6 hours, and the right lower limb was put on bed rest for 24 hours; at the same time, the patient was given aspirin enteric-coated tablets to resist platelet aggregation, atorvastatin calcium tablets to stabilize plaque, and nifedipine tablets to control blood pressure. The patient felt that the skin temperature of the lower limb was significantly higher than before after the operation, and the imaging showed that the lower limb artery was well visualized, and there was no adverse symptom after compression bandage was applied to the puncture point. After 12 days of hospitalization, the renal function and blood ion were rechecked without obvious abnormality, and the patient had no chest tightness, shortness of breath, and no pain in the precordial region. Postoperative dressing change revealed that the right inguinal puncture point was healing well without redness, swelling and oozing, and the pain in the right lower limb disappeared. The patient was self-conscious and in good condition. So the patient was allowed to be discharged, and before discharge, the patient was instructed to follow up in outpatient clinic on time. IV. Precautions We are glad that the patient’s symptoms of lower limb pain and low skin temperature improved significantly after relevant treatment, and his body recovered gradually. Since lower limb arterial stenosis is related to life habits, in daily life, patients are advised to strictly quit smoking and drinking, and to perform lower limb functional exercises, such as brisk walking, jogging, bicycling and other exercises, which can help to improve the circulation of lower limb arteries; diet, it is recommended to take in some fresh, vitamin-rich foods, including lettuce, apples, etc. Meanwhile, patients should follow the doctor’s instructions and persist in taking the medication for a long period of time. Meanwhile, it is necessary to follow the doctor’s instructions to insist on taking medication for a long time and review the ultrasound of the lower limb arteries every year to avoid any adverse situation. V. Personal perception Most of the severe stenosis and occlusion of lower limb arteries are based on hypertension, diabetes mellitus, hyperlipidemia and other diseases, such as the patient in this case for the post-cerebral infarction attack. In daily life, in order to prevent this disease, we should avoid bad habits, such as long-term smoking, drinking alcohol and so on. If lower limb arterial stenosis is diagnosed, the patient should consult a doctor in time to get a clear diagnosis, and apply medication under the guidance of a professional doctor. If the medication is not under control, the patient should undergo surgery in time to improve the circulation of the arteries in the lower limbs and reduce the symptoms.