Hello and welcome to health care magic The relevance of spitting blood after trauma depends on many factors. If it s small amounts of black /cola coloured blood, then it s almost ok as it is the altered blood formed from small tears which might have formed in your oral tract during the injury. If so, it will heal by itself. If you were wearing a safety helmet during riding, again you are on the safe side. But the most important thing is that we had to rule out fractures of skull and face which can also result in spitting of blood. So my advice is to go and visit the doctor you are seeing and let him take a CT scan of your head. If it s normal then there is nothing to worry about. Hope this discussion will be helpful to you. Have a great day