Hi, My Dad, when ever wakes up from bed in morning or any time, when he spits sputum a light traces of blood is seen, when we have consulted doctor he said its because throat infection, whereas my Dad doesnt have caugh or swallowing problems, so doctor sujjested for blood tests, ECG, chest X-Ray, and Endoscopy. do we need to perform all these test. what might be the problem. regards Praneeth