Fatigue Make an Appointment Refer a Patient Ask a Question Reviewed by Bronwyn Long, DNP, MBA, RN, Jeffrey Kern, MD, Laurie L. Carr, MD (October 01, 2019) Fatigue is the most common symptom experienced by people being treated for lung cancer. You may feel tired at certain times of day, tired all the time or too tired to participate in activities of daily living and self-care. You may be tired from your lung cancer, tired from the effects of treatment or both. Fatigue can be caused by the lung cancer, low blood count, poor nutrition, cell death and repair due to chemotherapy and radiotherapy, mental exhaustion, worry, stress, pain, spending too much time in bed and medications used for treatment or comfort. Treatments Diet and exercise Avoid alcohol and caffeine, which can interfere with the sleep cycle. Engage in moderate exercise (e.g., a daily walk down the street) to boost energy. Drink a lot of water to help prevent dehydration, which can increase fatigue. Environment Practice good sleep hygiene. Go to bed in a darkened room at the same time each night. Schedule naps and quiet time during the day. Schedule time for visitors or phone calls. If your fatigue becomes severe, your doctor may prescribe medication to help reduce fatigue. When to Call the Doctor Call your doctor within 24 hours if you have any of the following: Confusion Dizziness Loss of balance Inability to get out of bed for more than 24 hours Severe shortness of breath Worsening fatigue and other symptoms Diarrhea Insomnia Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.