The black bruise on the tongue may be caused by bite wounds, blood diseases, hemangiomas and other reasons.
1. Bite: In the process of eating and drinking, the tongue is bitten accidentally, which may cause black bruise-like things on the tongue.
2. Blood diseases: for example, idiopathic thrombocytopenic purpura, leukemia, hemophilia, etc. affect the normal function of the blood, which can also cause the appearance of black bruise-like things on the tongue.
3. Hemangioma: the appearance of hemangioma on the tongue can also cause the appearance of black, bruise-like things on the tongue.
There may be other reasons for the appearance of black bruises on the tongue, and it is necessary to go to the hospital for examination to clarify the cause.