Radiation therapy is a common treatment option for lung cancer, and it works by using high-energy radiation to destroy cancer cells in the lung. Although radiation therapy is generally well-tolerated, it can cause a range of side effects, which may vary depending on the individual patient and the type of radiation used. Here is a summary of the anticipated side effects of radiation therapy for lung cancer, week by week:

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Week 1-2:

During the first week or two of radiation, patients may experience mild fatigue and skin irritation, such as redness or itching, in the treatment area.

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Week 3-4:

Not all lung cancer patients receive more than two weeks of radiation. For those who do, in the third and fourth weeks of treatment, patients may experience more severe fatigue and shortness of breath, as radiation can cause inflammation in the lung tissue. Patients may also experience some nausea, vomiting, or loss of appetite during this time.

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Week 5-6:

During the fifth and sixth weeks of radiation therapy, patients may experience continued fatigue and shortness of breath, as well as coughing and chest pain. Skin irritation may also worsen, and some patients may experience a loss of hair in the treatment area.

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Week 7-8:

In the final weeks of treatment, patients may continue to experience fatigue and shortness of breath, as well as a dry, persistent cough. Skin irritation may also be severe, with redness, peeling, and blistering in the treatment area. Patients may also experience some difficulty swallowing or a sore throat, as radiation can affect the tissues in the throat and esophagus.