Greetings Sir/Madam. First of all the above query does not involve data like age, sex etc., which are very important information for us as doctors to help you in such kinda situation. Assuming you are a senior citizen i am answering you this question. The reason for losing weight may be of various reason from nutrition imbalance , impaired absorption, disease ranging from that of Viral Infection, Tuberculosis, Diabetes to extreme as Malignancy(Cancer). So in order to help you we need at first to personally look the patient , examine and the further order patient the necessary investigation. In meantime any intervention to be done has to be done. Further after co relating only we can come to a conclusion of what exactly bothers your health resulting in losing weight. Hope it gave you right guidance for you to take further decision. I personally advice you to go to a nearby doctor and follow what ever told by the doctor. Wishing you for Speedy recovery from such problem..