Sudden loss of weight - Online Doctor Chats

Doctor :   hi
Doctor :   how can i help you
User :   Hello. Got a serious question fer ya. I just lost 80 pounds not dieting, any ides why? I'm a light, socila smoker too.
User :   Ideas.*
User :   Social, smoker.* Argh, typos
Doctor :   withing how many weeks or months?
Doctor :   u lost so much weight
User :   about 5-6 months, roughly
Doctor :   Please provide these details: Age, Gender, Location, Occupation, Marital status, Height and Weight.
User :   Male, 23, Chippewa Falls Unemployed currently, good health(After losing weight) single 6' 200 pounds now
User :   Chippewa Falls, WI
Doctor :   Do you have Allergies / Diabetes / Thyroid problem / High Blood pressure/Heart disease/ Asthma/use medicines for any illness
User :   seasonal/common
User :   Little asmtha I was in a house fire
Doctor :   ok
User :   seasonal allergies, forgive me
Doctor :   do u have cough as of now?
User :   no
Doctor :   is there any evening rise of temperature in recent past?
User :   no, nothing unusual with temps, feelings, aside from normal aches from doing yardwork
Doctor :   ok
Doctor :   is ur appetite reduces?
Doctor :   reduced these days?
User :   No, same appetite.
Doctor :   Please mention about the Sleep, Urine,Stools and , any specific problems with them