Blood In The Sputum- Symptoms, Causes, Risk Factors & Treatments Sputum is a thick mix of both saliva as well as mucus that comes out from the respiratory tract while coughing. In general, it is not a serious issue, but sometimes, blood can be seen in the sputum while coughing or splits. However, blood in the sputum can be alarming. It may not always indicate a serious condition in healthy persons or youngsters; it can occur in several respiratory infections, including mild bronchitis and asthma. However, there are some cases where a substantial amount of blood is present in the sputum, and the severity of the symptoms can indicate a severe lung or stomach infection that should not be neglected at any cost. A person needs to get diagnosed with the root cause of the bloody phlegm and get proper treatment, especially for the elderly. Consulting the best lung doctor, Dr. Arvind Kumar is a must to get yourself thoroughly checked immediately. Visit: https://drarvindkumar.com/blog/blood-in-the-sputum.php