Example of complications that can occur when administering an injection to a patient?

Complications that can occur when administering an injection include infection at the injection site, which can lead to abscess formation or systemic infections. There may also be localized reactions such as swelling, redness, or pain, and in some cases, allergic reactions can occur, resulting in anaphylaxis. Additionally, improper technique can cause nerve injury or hematoma formation, leading to pain or dysfunction in the affected area.