Bleeding from the tongue and spitting blood may be caused by trauma or diseases such as venous malformation of the tongue, as follows. 1. Trauma: In the process of chewing and eating, teeth bites, food cuts or burns may lead to bleeding from the tongue, and the blood can be mixed with saliva and spit out together. 2. Venous malformation: venous malformation can be blue or purple when the location is superficial, when the volume of the lesion is not big, there is usually no conscious symptom, if the infection occurs, it may cause bleeding, pain, swelling, surface mucosal ulcers and other symptoms. Tongue oozing blood, spitting blood there may be other reasons, it is recommended to go to the hospital in time, clear cause of the early targeted treatment.