The side effects of injections and infusions are greater than those of infusions, because the drugs are directly entered into the blood vessels and are prone to some adverse reactions, so there are some special drugs that should be routinely tested for allergies before use. The speed of infusion and the number of drops per minute should be controlled for the more irritating drugs, and there are certain principles of treatment. Some patients are prone to phlebitis during the treatment of intravenous infusions, and even some patients may suffer from subcutaneous or soft tissue inflammatory nodule formation during the process of intramuscular injection, and the patient may also show significant pain. If local adverse reactions occur after the administration of special drugs, appropriate physical therapy is also required.