- Pain during or after cancer treatment is caused by the nervous system attempting to rebuild itself. Tumors can also cause pain.
- Loss of appetite is a common symptom of cancer and could lead to unwanted weight loss. Some treatments may cause mouth or throat soreness, which make it uncomfortable to eat, also resulting in weight loss.
- Certain cancers produce poisons that are released into the body and may cause the patient to experience nausea. Chemotherapy and radiotherapy are also known to cause nausea.
- Fatigue is often experienced by patients who are undergoing several different treatments at the same time. It may also be caused by the cancer affecting the body's ability to absorb necessary nutrients.
- Skin problems such as itching, sweating and body sores due to the toxic chemicals released into the body by the cancer. It is also possible for a patient to experience an allergic skin reaction from treatments.
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