Will live only a few days and has a new medical problem is there an obligation to treat new problem?

Igros Moshe (Choshen Mishpat II #75.4)Question A very sick person whom the doctors think will live  only at most another week has now developed a new illness such as pneumonia, is it permitted or even obligatory to treat the new illness? Answer It is obvious and clear that there is an obligation to cure him of the second condition in that which is possible to accomplish even when the original condition can not be cured. I don’t understand why you think this is even a question unless the treatment might make the first illness worse. If the doctors say they don’t know whether the treatment of the second illness will make the first illness worse  It depends whether they give a reason for the doubt. If they give a reason than you should be concerned. If they don’t have a reason but simply they never heard anything or ever saw it discussed in medical books than it has no significance to reject the view of doctors that treatment will help even if these doctors aren’t the top doctors bur might be ordinary people that are claiming the treatment works. While waiting for treatment it is important to feed the patient if he is hungry and to do everything under a doctors supervision. It is therefore prohibited to live in a place without a doctor.