Chronic constipation which is a result of a reduction in bowel motility due to a lack of
coordination between nerves and muscles is one of motility disorders of the digestive system.
Chronic constipation overlaps a large group of diseases, including functional dyspepsia, IBS and
GERD (16). 29% of patients with functional dyspepsia and 29% of patients with GERD suffer
from chronic constipation (17). This fact shows the relationship between these motility disorders.
According to the same physiopathology mechanisms of chronic constipation and GERD,
improvement of intestinal motility disorder may be effective in relieving symptoms of GERD. It
means that GERD is an extra intestinal symptom of constipation (18). Other extra intestinal
symptoms of constipation such as headache and depression necessitate the treatment of
constipation (19, 20).