...,sore throat sometimes,nervousness ,stiff neck ,jaw,sore teeth ...was caused by a severe zinc deficency,that turned out to have ...docs suspect Pyroluria which causes zinc deficency etc etc.Long story short...
Bloody or tarry stools refer to a stool sample that is either dark red or black in color. Bloody or tarry stools can indicate bleeding or other injuries in your gastrointestinal tract. You may also have dark, discolored bowel movements after eating dark-colored foods.
Yellow stool can indicate that food is passing through the digestive tract relatively quickly. Yellow stool can be found in people with GERD (gastroesophageal reflux disease). Symptoms of GERD include heartburn, chest pain, sore throat, chronic cough, and wheezing. Symptoms are usually worse when lying down or bending.