Blood in sputum in the morning and not during the day may be caused by bleeding gums, pharyngitis, rhinitis and so on. 1. Gum bleeding, is a relatively common cause, night brushing or eating after the formation of damage to the gums, resulting in bleeding, during which the bleeding stops on its own, can appear in the morning sputum with blood in the performance. 2. Pharyngitis, due to inflammation of the mucous membrane damage to the throat area, can cause bleeding. If it can’t be discharged in time at night, it will be mixed in the sputum. Blood in sputum when coughing up sputum in the morning is a common symptom of acute or chronic pharyngitis. 3. Rhinitis, nasal mucous membrane bleeding caused by rhinitis, at night through the nasal cavity into the throat, resulting in the appearance of sputum with blood. 4. bronchitis, the morning position changes the flow of phlegm, if the trachea itself there is inflammation, will stimulate coughing and coughing up blood sputum. Early morning sputum with blood during the day there may be other reasons. Specific causes need to be examined by a doctor to clarify, and at the same time in accordance with the doctor’s instructions for treatment.