Are you drinking tap water by any chance? Depending on what part of the UK you're in, the tap water can be pretty ghastly and can definitely contribute to spots.
Originally Posted by Nstocks
Also, it's possible that you're over-hydrating. I agree with Zach about the tea: it won't hydrate you. Try drinking warm water with salt and lemon. Also, how's your body temp? If it's too low your body may not be hot enough to absorb the water that you're consuming and you just pee it out.
Not trying to make you orthorexic about water now! Like I said before, I would aim for a really moderate approach diet-wise, including your water consumption: keep hydrated, but don't try to chug too much. Would be curios to see if it effects your circles or acne.
You're really young and you'll bounce back. I think the most important thing is to work on having a healthier relationship with food. Did you read the article Neckhammer linked? I thought it was good.
"I think the basic anti-aging diet is also the best diet for prevention and treatment of diabetes, scleroderma, and the various "connective tissue diseases." This would emphasize high protein, low unsaturated fats, low iron, and high antioxidant consumption, with a moderate or low starch consumption.
In practice, this means that a major part of the diet should be milk, cheese, eggs, shellfish, fruits and coconut oil, with vitamin E and salt as the safest supplements."
- Ray Peat