Final answer:
After needle removal and pressure application, clean the site, apply a bandage, and dispose of the needle properly.
Step-by-step explanation:
After the needle is removed from the arm and pressure is applied, the first thing that needs to be done immediately is to clean the site with an antiseptic wipe or solution to prevent infection. This is important because any puncture site carries the risk of introducing bacteria into the body, so proper cleaning is crucial.
Additionally, it is advisable to apply a sterile adhesive bandage over the puncture site to protect it and help prevent contamination. This can also help in applying pressure to the site to stop any bleeding.
Finally, the used needle should be disposed of properly in a sharps container or other approved disposal method to avoid accidental needlestick injuries.