If the patient has symptoms of cold knees, he/she can consult orthopedics, vascular surgery, rheumatology and immunology departments according to the accompanying symptoms and medical history. 1. Orthopedics: If the patient’s knee is cold, accompanied by knee pain, swelling, limited movement, joint deformity, muscle atrophy and other symptoms, he or she may suffer from osteoarthritis of the knee, bursitis, synovitis, joint infection, etc., and should go to orthopedics for consultation. 2. Vascular Surgery: If the patient’s knee is cold, accompanied by numbness, pain, and abnormal sensation, it is considered that the patient may have arterial occlusion caused by vascular disease in the lower limbs, and he/she should go to the Vascular Surgery Department for consultation. 3. Rheumatology: If the patient has fever, cold, joint pain with pressure, morning stiffness, skin erythema, subcutaneous nodules, increased nocturia, renal colic, difficulty in urination, etc., he/she may suffer from rheumatoid arthritis, gouty arthritis, etc., and should go to Rheumatology. Patients can choose the appropriate department for consultation according to their own symptoms, and identify the cause of the disease under the guidance of the doctor and receive treatment as early as possible.