Losing weight without trying might sound like a dream come true, but in reality it can signal a health problem. If you're not obese and you've lost more than 10 percent of your body weight during the past six months you need to consult nearest physician... 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 physician they will do the needful.

Yes You have to do specific tests Please do Arogyam 1.4 from thyrocare