This suggests that people are born with a dislike of heights. However, most children and adults are a bit nervous around heights, but they don't have a phobia. Many scientists think that a phobia is a learned response to either a parent's fear of heights or a traumatic experience in childhood, like a fall. Show the video to your parents and friends.
Causes Of Melena. Black stool or melena causes include: 1  Peptic ulcer that includes stomach ulcer, duodenal ulcer. 2  Stomach cancer. 3  Patient on anti-coagulant drugs such as Warfarin may cause melena. 4  Gastritis (inflammation of stomach) and esophageal varices.5  Hemorrhagic blood disease such as purpura.ymptoms of melena or blood in stool are: 1  Patient complains change of stool color to his medical attendant; it is dark black like coal tar. 2  Anemia is most important sign noted in patients with melena.
Or it could mean you have blood in your stool. If your stool is black, very foul smelling and very sticky this could be what doctors call melena which means you are bleeding from your GI tract. In brief: It depends. It could mean it is from something you ate, for instance peptobismol will cause black stools. Or it could mean you have blood in your stool. If your stool is black, very foul smelling and very sticky this could be what doctors call melena which means you are bleeding from your GI tract. It could mean it is from something you ate, for instance peptobismol will cause black stools. Or it could mean you have blood in your stool.