there are several conditions that can cause unintentional weight loss in a young person. some of the common possible causes include hyperthyroidism (overactive thyroid gland) diabetes or a problem with absorption of nutrients and vitamins in your digestive tract. depression and anxiety can sometimes lead to weight loss. some infections can lead to weight loss. certain medications can have a side effect of weight loss. cancer can sometimes cause unintentional weight loss. cancer occurs more commonly in older people and is a less common cause of weight loss in young people. it would be best for you to see a doctor who can do a medical evaluation to help determine the reason for your weight loss.
how can i eat so much be completely inactive and still lose weight? . i eat more than anyone in my family. and due to my back problems i am completely inactive like no exercise whatsoever. but everytime i seem to weigh myself ive lost more weight. im 20 years old and i still cannot even get to 100lbs. is there something wrong with my metabolism?