<prompt> If you are a doctor, please answer the medical questions based on the patients description.My son 9 just told me he was drooling uncontrollably during a bowel movement. I thought, Odd, but not particularly alarmed. On the other hand, he seemed rather disturbed that it happened. I suggested that it could simply be a bodily reaction to the relief he was feeling, but I would like to know more.  <response>: Hi, thank you for posting! I have gone through your query and I understand your concerns. In my opinion, your sons symptoms indicate that he suffers from hypersalivation, which may be a result of an abdominal disease, such as HERD gastroesophageal reflux disease or a liver disease. Your son need the following tests:- Abdominal ultrasound-Liver test-Complete blood count-Urine testy should consult your gastroenterologist, in order to determine the right diagnosis and treatment. Hope this helped. All the best, 