Please choose the correct ending to complete the given sentence: Health: [header] How to treat a blood blister [title] Remove pressure from the blood blister. [step] Start by eliminating any pressure and exposing the blister to the air. You want to make sure nothing rubs against it, or presses down on it.

Ending1: [substeps] Soak a cotton ball or pad in the hydrogen peroxide solution. Wring the cloth and gently wipe away any excess hydrogen peroxide solution that remains after it is cleaned. Ending2: Then, change your pad every 20 to 30 minutes throughout the day. [substeps] If you know you're sweating, consider leaving a cool compress over your blood blister. Ending3: Exposing it to the air allows it to start healing naturally. If it is not under any pressure, it will stay intact and the chances of it tearing or bursting and becoming infected are lessened. Ending4: Then, take off any excessively covering of the blister and put on gloves. [title] Wash and change your hands before and after touching the blister.

Answer format: ending1/ending2/ending3/ending4