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Coconut water sold in stores is pasteurized and won't be as effective as the liquid inside whole coconuts. Rather than buying the water in stores, purchase whole coconuts, open them up and use the liquid inside. You can drink it as well as apply it to your skin. Some people have allergies to coconut when it's ingested. Coconut oil has been known to affect the skin with swelling, discoloration, and redness. If drinking coconut water or using coconut oil on your skin has caused reactions in the past, coconut water may have a similar effect. Stop using coconut water if you notice signs of an adverse reaction. If symptoms of an allergic reaction do not clear up after you stop using coconut water, talk to a doctor. It's a good idea to apply coconut water to a small patch of your skin before using it all over your body. The benefits of coconut water are largely based on anecdotal evidence. While coconut water works for many, you should not neglect a doctor's recommendations to use coconut water. If you're being treated for a specific skin conditions, such as eczema, talk to your doctor before using coconut water and stick to your regular treatment.

Summary:
Get coconut water from whole coconuts. Cease use if you have an allergic reaction. Do not neglect doctor-recommended treatments.