This is the prescription of the physician in our family. When you see rashes or reddish on your skin due to probably insect bites or sting, don’t apply ointment at once. Wash the affected part with soap and water. Better if you soap it for 1 minute for further cleansing. Dry it afterwards before applying Apple cider vinegar. The acid of the vinegar will neutralize whatever venom or irritant there is in your skin.