Please choose the correct ending to complete the given sentence: Health: [header] How to heal armpit rash [title] Wash the affected area with soap and water. [step] Place an ice pack or a damp towel against the armpit rash. You could also place a handful of ice cubes in a plastic bag and hold it against the rash.

Ending1: This will reduce the swelling and inflammation of the skin. [substeps] This technique is especially useful for heat rashes and rashes caused by lichen planus, an inflammatory skin condition. Ending2: However, the water will be too hot for the ice pack to do a good job, so always use a towel to help keep the ice on your skin. [title] Look for signs of frostbite. Ending3: Rub the ice pack against the rash for five to ten minutes. [substeps] If the rash does not heal within five to ten minutes, you may need to see a doctor to see if the rash will not go away. Ending4: Don't apply ice directly, however. [title] Use a cotton swab to soak up any necessary fluid.

Answer format: ending1/ending2/ending3/ending4