My sister having same problem . She bleeds mouth often. But we had thousand test start from all kind of blood , endoscopy , x ray chest, tb test ,ct scan , MRI , went ent , gastro, blood specialist , dentist , internal madicine, neuro sergent, every one in Bangladesh and India. Every things cum normal. Evey one says normal. Unknown cause. Will cure when she grown up. She is 14 and bit fatty(cubby). It s been 4 years. Now. But she still bleeds. No idea where to go. We really want to find the rite of bleeding . Only think we can mention . She had banged her head with wall and the blood star after few days . But we also checked Butcame normal . Any one to help to give us idea where to go.....