1. Prepare items (liquid medicine, disposable syringe, cotton swab, grinding wheel, iodine, alcohol);
2. Check the name of the drug, pay attention to whether it is bad or not, whether the bottle is broken or not;
3. The medicine liquid ampoule or bottle cap should be opened after disinfection;
4. The air in the syringe should be discharged after inhalation of the syringe;
5. Select the injection site: usually the outside of the upper arm is subcutaneously subcutaneously;
6. The injection site should be 2% iodine tincture and 70% alcohol disinfection;
7. Knead the skin of the injection site with the hand, inject the needle into the skin, return the blood without blood, and push the liquid;
8. Pull out the needle, and press for a moment with cotton ball or cotton swa
