What should I do if I don't feel hungry and I'm doing black?

Black or tarry stools may indicate the presence of blood in the stool, if you have not consumed berries or other dark fruits, nor do you take iron or bismuth - such a symptom requires diagnostics and indicates the need for urgent contact with a doctor - it is best to go to the gastrologist, but if this is impossible in a short time, then to your family doctor. Prolonged abdominal pain and lack of improvement after the prescribed drug are also not the correct signal. Unfortunately, I do not know how to understand the notation "I have bile in the flight". It is therefore difficult for me to relate to this.