Hi doctor. My name is Quynh Nhu, I am a freshman, 2 years ago, my stomach used to be painful and often had diarrhea, stools were rarely normal. Her parents took her to an endoscopy and test, took out the fluid to see if it changed color and the result did not change to pink and she also did not have the HP virus.

I often have abdominal pain and loose stools (difficult to form) and often fart continuously and long. My fingernails have been showing black streaks for a long time. The doctor told me that I often have abdominal pain, loose stools with farting, what are the signs of disease? Is it dangerous for my nails to appear black, doctor? Thank you doctor.