Spitting blood. Why?

The patient spit when there is blood, there may be patients showing bleeding gums or tongue, throat showed lesions. If the blood does not continue to increase, generally do not worry, temporary observation can, if the patient oral bleeding more and more, we should consider going to the hospital to check, see the cause of bleeding, if necessary, under the guidance of the doctor to apply hemostatic drugs for treatment, must pay attention to their oral hygiene.