Please choose the correct ending to complete the given sentence: Health: [header] How to relieve blister pain [title] Remove the source of the blister. [step] Most blisters will heal on their own if the source of the blister or the causative agent is removed or eliminated. As soon as you see the beginnings of a blister, take away the cause immediately if possible.

Ending1: [substeps] If the blister you think was beginning to expose itself cannot scab over, remove the source of the blister using sterile bandages. Cut off any excess fluid with a sharp knife as soon as possible. Ending2: [substeps] Making sure you are not moving the blister at all when it is exposed to air is critical. Avoiding air can prevent the blister from healing. Ending3: Do not allow the material to dry out. If the material passes through your blister, it will cause the blister to rupture. Ending4: [substeps] For example, remove uncomfortable shoes or clothing that might be causing the blister. If you are blistering from cold or heat, remove your body from the source of the temperature.

Answer format: ending1/ending2/ending3/ending4