Sudden Weight loss, not expected

So I've been trying to lose some weight (read: abdominal fat) for the past 2 months or so, and until last week, I stayed pretty stable at around 195 pounds (I'm 6 ft, male, 20).  However, starting at most a week ago, my weight suddenly "crashed" from 195 pounds to 180 pounds.  This is nice - it's what I wanted - but the thing is, I hadn't been doing anything special or new in the last week, so this kind of took my by surprise.  If I haven't lost much weight at all in the past two months, why am I suddenly losing it now?  Is it normal for weight loss to start happening a few months after you start trying, or is this something else?

[Dr. Kokil Mathur]

Hi
Welcome to the MedHelp forum!
Reweigh your self. It could be a weight scale error. If indeed you have lost all that weight then consult a doctor as this much weight loss is not good that too happening within a week. There are many causes like worms in stool, depression, anorexia nervosa, AIDS, cancers especially colon cancers, drug abuse, infections and loss of appetite. Loss of appetite can again be due to certain medications, drug abuse, depression, AIDS, acute and chronic infections, cancers and hypothyroidism. Either you do not eat well or there is increased metabolism as in hyperthyroid states, HIV, cancer etc. Poor absorption as in irritable bowel syndromes and malabsorption syndromes too is possible. Malabsorption syndromes are seen in intestinal tuberculosis, HIV, tropical sprue, parasites in stool and Whipple’s Disease. Diabetes too can be the cause.
Please consult your PCP for primary examination followed by proper referral.
Hope this helps. Take care!