severe weight loss
might be due to a number of causes, and most of them are serious enough to warrant detailed evaluation by a qualified doctor. it can manifest in the form of hollowing cheeks or temples, clothes becoming loose and fatigue
is unlikely to cause such marked weight loss, though some amount of fatigue and anxiety
might be associated with it.
kindly consult a qualified physician, for a detailed workup. you might require further specialist referrals based on them.
hope this was helpful.
Dr. A. Rao Kavoor