Read this article
My problem areas:
4 & 5: Kidneys — Anything around the eyes (including dark circles) point to dehydration. Drink up!
9 & 10: Respiratory system — Do you smoke? Have allergies? This is your problem area for both. If neither of these is the issue, don’t let your body overheat, eat more cooling foods, cut down on sugar and get more fresh air. Also keep the body more alkaline by avoiding foods that make the body acidic (meat, dairy, alcohol, caffeine, sugar) and adding more alkalizing foods like green veggies and wheatgrass juice. Another thing that most of forget – dirty cell phones and pillow cases are two of the top acne culprits and this area is what they affect the most
Not so sure on how much I can rely on this science but I do eat poorly and don't drink enough water so it must have some validity to it. For each problem area mentioned though the cause is different, the treatment (drink water and eat better) is the recommended solution.