People with cancer have different dietary needs. Some people feel well and able to eat normally. For others, weight loss or a poor appetite were symptoms that led to their diagnosis. If you had eating problems before you were diagnosed, you may need some support from your doctor or dietitian to improve your diet before you start treatment.
Some eating problems may be related to the cancer itself. Depending on where the cancer is in your body, it can cause you to feel sick (nausea), be sick (vomit), or it can cause pain or poor digestion. The cancer may also change the way your body uses the food you eat, so that you don’t get all the nutrients you need.