Physical examination
A complete physical examination may be needed especially to rule out signs of dehydration.
Dehydration is usually caused due to excessive fluid loss due to diarrhea or vomiting.
Dehydration is characterized by dry skin that remains tented after a pinch, sunken eyes, dry mouth, no sweating in the groins or armpits, no urination for long durations etc.
Weakness or paralysis may also be diagnosed on physical examination and may be indicative of Botulism which needs immediate therapy.
Blood pressure, pulse and temperature are also measured. Severe dehydration is manifested with weak pulse and low blood pressure.
If there is accompanying fever, temperature assessment may be helpful.