The side effects of bone scanning examination are the side effects of the contrast agent. The most common reaction is skin rash within 2~4h after injection, and individual patients may have headache, nausea, and peripheral fever 30min after injection, but these side effects are usually relieved by themselves within 2h. Bone ECT examination is generally risk-free, but because of the need to inject contrast agent, a very small number of patients may experience rash, nausea, headache and other discomforts. However, the amount of contrast agent used is within the safe dose, and it can usually be completely metabolized in about 48 hours by drinking water. It is important to note that after the injection of the contrast agent and after the examination, drink plenty of water to promote the absorption and excretion of the drug. Remove metal objects, such as necklaces, keys and coins, from your body during the examination to prevent affecting the results. Empty the bladder before the examination and avoid holding urine. Keep emotionally stable and don’t move around during the examination. If you can’t cooperate because of pain, you can use analgesics.