Hi, Thanks for writing in. Cancer associated vomiting can occur as an acute event or take a chronic course. It looks like your relative is having a chronic vomiting and cachexia course that needs attention. Many patients have vomiting due to the thoughts of previous chemotherapy and radiation treatments. The initiation of controlling the vomiting can be made by giving anti emetic as recommended by his doctors. Once the initial vomiting is stopped then he can be provided support and help in ways including Nutrition changes, Acupuncture and acupressure, Behavior therapy and Relaxation methods. Since a patient of cancer who is taking treatment is under tremendous stress and uncertainty about the curse of his illness and when he will get cured, he needs help to cope up with this situation. It is more of a psychological element that can be modified to control his stress. Please do not worry.