9) Headaches
This is not an early sign of lung cancer. In this cancer, headache often appears when there is already metastasis of cancer to the brain. According to recent clinical trials, pulmonologists have found that not all headaches are due to the spread of cancer to the brain. Some are due to the continuous build-up of pressure on the neck and chest veins, especially an external jugular vein and superior cava.
These are large blood vessels that transport blood from the upper body (skull, face, and neck) to the heart. A specific type of lung cancer called non-small cell carcinoma is associated with causing migraines.
