India, Dec. 4 -- If you've had a cough that's lingered for weeks and seems to be getting worse, it's time to stop relying on cough syrups and see a doctor without delay. Persistent symptoms like these can sometimes point to something far more serious - including lung cancer. To help you recognise when a cough is more than "just a cough", here are the red flag signs you should never ignore.

Dr Tarang Krishna, a cancer surgeon specialising in cancer immunotherapy, and managing director at Cancer Healer Centre, with over 22 years of experience, has shared three red flag signs of lung cancer that must not be ignored. In an Instagram video posted on December 3, the surgeon highlights, "Lung cancer is one of the deadliest cancers. But it is of...