Bad wrinkles under eyes. 43 but look 80. Lost weight. Think something wrong beyond age/weight loss. Drink soda, use retin-a, hot showers, need to use eye moisturize. I worry alot. What's cause/remedy?

Cosmetic, treatable. Though you have health issues, this is probably unrelated. Usually hereditary--look at your parents' lower lids. Most likely correctable with outpatient surgery or chemical peel for resurfacing. No otc remedy known to work. Good news-treatment safe ; long-lasting. Bad news-not covered by insurance.