Dehydration

Except for primary polydipsia, which causes you to retain too much water, diabetes insipidus can cause your body to retain too little water to function properly, and you can become dehydrated. Dehydration can cause:

• Dry mouth
• Changes in skin elasticity
• Low blood pressure (hypotension)
• Elevated blood sodium (hypernatremia)
• Fever
• Headache
• Rapid heart rate
• Weight loss

Electrolyte imbalance

Diabetes insipidus can also cause an electrolyte imbalance. Electrolytes are minerals in your blood — such as sodium and potassium — that maintain the balance of fluids in your body. Electrolyte imbalance can cause symptoms, such as:

• Fatigue or lethargy
• Nausea
• Loss of appetite
• Muscle cramps
• Confusion