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Treatment of Symptoms

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    See the Oral Mucositis and Infection sections of the PDQ summary on Oral Complications of Chemotherapy and Head/Neck Radiation for more information on mouth sores and infections.

    Nausea

    Nausea caused by cancer treatment can affect the amount and kinds of food eaten. The following may help cancer patients control nausea:

    • Eat before cancer treatments.
    • Rinse out the mouth before and after eating.
    • Eat foods that are bland, soft, and easy-to-digest, rather than heavy meals. Eat small meals several times a day.
    • Eat dry foods such as crackers, bread sticks, or toast throughout the day.
    • Slowly sip fluids throughout the day.
    • Suck on hard candies such as peppermints or lemon drops if the mouth has a bad taste.
    • Stay away from foods that are likely to cause nausea. For some patients, this includes spicy foods, greasy foods, and foods that have strong odors.
    • Sit up or lie with the upper body raised for one hour after eating.
    • Don't eat in a room that has cooking odors or that is very warm. Keep the living space at a comfortable temperature with plenty of fresh air.

    See the PDQ summary on Nausea and Vomiting for more information.

    Diarrhea

    Diarrhea may be caused by cancer treatments, surgery on the stomach or intestines, or by emotional stress. Long-term diarrhea may lead to dehydration (lack of water in the body) or low levels of salt and potassium, which are important minerals needed by the body.

    The following may help cancer patients control diarrhea:

    • Eat broth, soups, bananas, and canned fruits to help replace salt and potassium lost by diarrhea. Sports drinks can also help.
    • Drink plenty of fluids during the day. Liquids at room temperature may cause fewer problems than hot or cold liquids.
    • Drink at least one cup of liquid after each loose bowel movement.
    • Stay away from the following:
      • Greasy foods, hot or cold liquids, or caffeine.
      • High-fiber foods—especially dried beans and cruciferous vegetables (such as broccoli, cauliflower, and cabbage).
      • Milk and milk products, until the cause of the diarrhea is known.
      • Foods and beverages that cause gas (such as peas, lentils, cruciferous vegetables, chewing gum, and soda).
      • Sugar-free candies or gum made with sorbitol (sugar alcohol).
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