I have lost over 40 lbs, sweat profusely and its smells like ammonia no matter what time of the day, mainly hands feet and underarms, and i have no appetite but force feed myself instead and still cannot gain my weight back, i have had my thyroid checked, blood tests and glucose tests. I am now 93 ilbs, the lowest weight I have ever been. I am 29 years old and this started last summer. What could it be.