Many urban legends are framed as complete stories with plot and characters. The compelling appeal of a typical urban legend is its elements of mystery, horror, fear or humor.Often they serve as cautionary tales.ecause people frequently allege that such tales happened to a  friend of a friend  (FOAF), the phrase has become a commonly used term when recounting this type of story. Sometimes urban legends are repeated in news stories, or distributed by e-mail or social media.
We have mast cells in the stomach wall. Somastatain-which is produced from d cells in the stomach wall is a known mast cell activator. We also know stress-in particular substance p and CRH also cause mast cells to spill contents. Histamine which we know is a chemical constantly released.
Histamine is a substance that is released from specialized cells called mast cells when they are activated, often as part of an allergic immune response. This test measures the amount of histamine in the blood or urine. Mast cells are large tissue cells found throughout the body. They are present mainly in the skin, the lining of the intestine and air passages, and the bone marrow. Mast cells are part of the body's normal response to injury as well as allergic (hypersensitivity) responses. They contain granules that store a number of chemicals, including histamine and tryptase, which are released when mast cells become activated.