Making the Diagnosis
Dehydration may be suspected in cases of persistent vomiting, diarrhea, or loss of fluid through the urine or the skin. Symptoms associated with severe dehydration include pale, cool, and clammy skin, a weak and rapid heartbeat, a shallow and hurried breathing pattern, and severely low blood pressure. Some people may also be anxious and restless and complain of thirst. Skin on the knees and elbows may be mottled.
Diagnosis of dehydration is usually based on symptoms and physical examination.