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Avoid applying apple cider vinegar to broken or damaged skin. Vinegar is irritating and may make your compromised skin vulnerable to bacterial infections. Your doctor can treat bacterial infections with topical or oral antibiotics. Minimize skin irritation by not putting vinegar on your face or genitals. This will likely sting and can compromise the integrity of your skin. It is especially important to avoid your eye area. Rinse your skin and halt your vinegar use if the vinegar stings or inflames your skin. There are no confirmed medical benefits of using vinegar topically. It's best to consult a doctor about any skin concerns rather than trying untested home remedies. Avoid applying apple cider vinegar to your skin for more than a minute or two at a time, especially not with occlusive dressings, such as bandages. Especially under dressings, vinegar can erode your skin and cause serious burns. Some skin types may be more sensitive to acids like vinegar than others, so it's difficult to advise on a safe level of exposure.
Use apple cider vinegar only on healthy skin. Steer clear of sensitive areas. Stop using apple cider vinegar if you feel burning or irritation. Don't put apple cider vinegar on the skin for prolonged periods of time.