Cancer can cause symptoms like pain and fatigue. Cancer treatment is used to remove or destroy cancer cells but can also cause side effects. Side effects are unhealthy or unpleasant physical or emotional reactions to treatment. Side effects can also include pain or fatigue as well as many other symptoms.
Not every patient with cancer gets symptoms. It depends on many factors. Such factors include the type and stage of cancer, and the type, length, and amount of treatment. In any case, relief from symptoms is often possible.