Spit in the morning is dark brown, generally speaking, is smoking or have rhinitis, or patients who love spicy food at night when they sleep will appear tar, including blood, into the respiratory tract in the morning after getting up and coughing out will become dark brown sputum. If this happens, it is not a particularly serious problem, and often provides a signal to the body, it tells the body that it may smoke too much, or eat too much chili or fire. The body needs to make some adjustments, such as quitting smoking, such as eating less spicy food or treating it with some fire medication.