abdominal pain, nausea, vomiting and watery diarrhea.
[cmaj.ca]
[…] occurring around the time of abdominal pain (i.e., hyponatremia [Na < lower limit of normal], tachycardia, hypertension, nausea and vomiting, constipation) Benefits of testing
[invitae.com]
Abdominal pain is usually severe, steady (unremitting) and widespread (diffuse). Less often, abdominal pain is described as cramping.
[rarediseases.org]