One should consult an oncologist if he/she notices any of following WARNING SYMPTOMS OF CANCER 1. Unexplained Weight Loss over a short period 2. Unexplained Loss of Appetite over a short period 3. Rapidly growing Lump 4. Persistent Cough for more than 3 to 4 weeks associated with Blood in Sputum / Breathlessness / Weight Loss 5. Blood in Stools associated with Change in Bowel Habits 6. Persistent Postmenopausal Bleeding 7. Non Healing Ulcer in oral cavity 8. Difficulty in Swallowing solid food associated with Pain during swallowing 9. Persistent passage of Blood in Urine Remember above mentioned symptoms can also be seen in other medical disorders so one should not get stressed out or get anxious. Best action would be to seek oncologist opinion at the earliest.