What happens when lung cancer has spread to the brain?

When lung cancer spreads to the brain, it can cause several symptoms and complications due to the presence of tumors in the brain tissue. These may include:

1. Headaches: Persistent or worsening headaches, often more severe in the morning.
2. Seizures: Sudden, uncontrolled electrical disturbances in the brain that may cause convulsions, muscle spasms, or loss of consciousness.
3. Changes in Mental Function: Cognitive changes such as confusion, memory loss, difficulty concentrating, or personality changes.
4. Weakness or Paralysis: Weakness or numbness in certain parts of the body, often on one side.
5. Vision Problems: Blurred or double vision, visual disturbances, or even partial or complete loss of vision.
6. Difficulty Speaking or Understanding Language: Aphasia, which can manifest as difficulty speaking, understanding speech, or finding the right words.
7. Coordination Problems: Lack of coordination, balance issues, or difficulty walking.
8. Nausea and Vomiting: Persistent nausea and vomiting, which may be unrelated to food or other factors.
9. Changes in Behavior: Mood swings, irritability, or emotional changes.
10. Increased Intracranial Pressure: As tumors grow, they can increase pressure inside the skull, leading to symptoms such as drowsiness, vomiting (especially in the morning), and changes in consciousness.

It's essential for individuals with lung cancer who experience any of these symptoms to seek medical attention promptly. Treatment options may include radiation therapy, chemotherapy, targeted therapy, immunotherapy, surgery, or palliative care to manage symptoms and improve quality of life.