Since palpitations are a rare warning sign, doctors recommend being alert to watch for other warning signs of illness as well. These may include chest infection that persists, coughing up blood, or pain when breathing and coughing. Loss of appetite, unexplained weight loss, fatigue and trouble swallowing are also symptoms of lung cancer.
Clubbing of the fingers also occurs in 35 percent of people with non-small cell lung cancer. In this, the tips of the fingers swell in the feet. First, the base of the nail softens and the skin around the nail bed becomes shiny. After this, the nails start to curve more than usual. Eventually, the tips of the fingers swell due to fluid accumulation in the soft tissues of the fingers.
Read more: High blood pressure: Surprisingly, this commonly used drug is associated with high BP