The symptom of hand trembling during the injection should be related to excessive tension, which causes involuntary hand trembling. It may also be related to emotional changes, so it is important to maintain a stable mood, avoid excessive tension, and try to breathe deeply and rest more. The symptoms of hand trembling when you get an injection, if you usually have panic, irritability, increased sweating and other symptoms, may be related to thyroid problems, you can go to the hospital for thyroid function tests, if you have hyperthyroidism, you can take drugs such as methimazole or propylthiouracil. If you have shaking hands, dizziness, headache, nausea, vomiting, numbness of limbs and other symptoms, it may be related to cerebrovascular diseases, such as cerebral thrombosis, cerebral arteriosclerosis, etc. You can do blood rheology, head CT, blood pressure and other tests to determine the cause of the disease before treatment.