For shivering, the patient is first advised to monitor the body temperature to see if the shivering is caused by fever. Next, the patient should be monitored for weight loss and panic attacks. If these symptoms are present, the patient should be advised to check thyroid function and thyroid ultrasound to see if the shivering is due to hyperthyroidism. Consider the patient’s age, whether the patient is an older patient, and whether the trembling is obvious at rest. It is important to rule out Parkinson’s syndrome and Parkinson’s disease. If the patient’s shivering is gradual and there are symptoms of autonomic dysfunction, such as constipation and sleep disorders, the patient is advised to consult a neurologist to rule out Parkinson’s syndrome. If the patient’s shivering is a slowly developing process without a gradual appearance, consider idiopathic tremor, which is a type of tremor whose cause cannot be traced.