Losing weight without trying can be a signal of health problem. If you're not obese and you've lost more than 10 percent of your body weight during the past six months...An unexplained drop in weight could be caused by various conditions including overactive
thyroid (hyperthyroidism),
diabetes, depression,
liver disease, cancer or disorders that interfere with how your body absorbs nutrients (malabsorption disorders)...Consult nearest physician or mention the tests that you have done we will surely help you.