Chemotherapy and radiation therapy can destroy constantly dividing cancer cells. But these treatments can also affect healthy cells. Medications and other self-help methods can ease many of these side effects:

• Loss of appetite
• Nausea and vomiting
• Weakness and fatigue
• Mouth soreness
• Hair loss
• Weight gain
• Premature menopause
• Lowered resistance to infections

Loss of Appetite

Loss of appetite is a common side effect of breast cancer treatment. Try these tips to ensure you are eating a healthy diet during treatment:

• Eat several small meals during the day, instead of three large meals.
• Try an "instant breakfast" mix or other nutritional shakes.
• Eat the largest meal when you are most hungry, which varies from person to person.
• Drink beverages either a half hour before or after meals so they do not interfere with your appetite.
• Consider moderate exercise to increase your appetite.

Nausea and Vomiting

Some - but not all - cancer patients experience nausea. You can take medicines called antiemetics before chemotherapy to reduce nausea. Keep track of when you have nausea. Nausea can occur right after treatment or several days later.

• Eat small meals frequently and avoid fatty, greasy foods and citrus.
• Try foods at room temperature instead of very hot or cold.
• When nauseous, try bland foods like crackers, gelatin, ice chips, rice, plain mashed potatoes or applesauce.

Contact your doctor if you have severe nausea or frequent vomiting. If you vomit, wait an hour before eating or drinking anything. Then, begin with ice chips and gradually add foods. Chamomile or ginger root tea, or ginger ale can sometimes help settle your stomach.

Weakness and Fatigue

Weakness and fatigue can have many causes, including the treatment itself, worry or depression, not eating, pain, inactivity and low blood counts.

• Make sure you get enough rest. Sleep at least eight hours a night, and try to lie down during the day to rest. Avoid caffeine if it interferes with sleep.
• Exercise. Short walks can actually increase appetite and energy. Exercise can help you rest better, even if you are feeling fatigued.
• Be choosy about activities. Get help from family and friends with errands and other chores.
• If you feel pain, let your oncologist know. There is no need to suffer in silence.
• Eat a diet high in iron.
• If fatigue is caused by low red blood cell counts (anemia), you may be given a growth factor called erythropoietin (Procrit), which stimulates bone marrow to make red blood cells. It can be given by injection, which can be continued at home. Patients receiving this are carefully monitored for rashes and blood pressure.

Mouth Soreness

Sometimes, a sore mouth or throat can be related to cancer treatment. Check with your doctor or dentist to rule out other causes of mouth pain.

• Ask your doctor about medicines to reduce mouth soreness.
• Choose soft foods that will not irritate your mouth, such as scrambled eggs, macaroni and cheese, pureed cooked vegetables and bananas.
• Cut foods into small pieces.
• Avoid citrus, spicy or salty foods and rough foods.

Hair Loss

Whether women lose their hair depends on the type of chemotherapy they take and the dose. Your oncologist will likely tell you if you can expect hair loss.