Hi, Thanks for posting in HCM. I understand your concern. Symptoms of vomiting black colour and passing black coloured stools is indicative of upper gastrointestinal bleeding. It needs to be explored for the site of bleeding and cause by means of upper GI endoscopy. Probably, an ultrasound abdomen might be also required to confirm the diagnosis. Based on the findings and diagnosis, appropriate management can be planned and instituted. Hope the information provided would be helpful. All the best.