<s>[INST] hi doctor ,,, its bleed from my mouth when i brush not only when brush . even when i woke up from my sleep and after i wash my mouth it been ok... after some time i get some blood taste on my mouth aft i wash again its been ok... i dont understand where the blood comes from .. from mouth or upper jaw or tongue? any sugestion? [/INST] Hello, Thanks for using Chat Doctor. It is difficult to know the site of bleeding without proper examination of oral cavity. In many of the patients with bleeding problem there is deficiency of vitamin C that leads to fragile blood vessels and bleeding. For examination of oral cavity see a dentist in person. He will examine oral cavity and do some coagulation tests to determine the coagulation profile which includes bleeding time, clotting time and INR. Before you can get an appointment with dentist kindly use vitamin C capsule or increase the citrus fruits in your diet. </s>