Central DI usually starts between the ages of 10 and 20 and occurs in males and females equally. Nephrogenic DI can begin at any age. The term "diabetes" is derived from the Greek word meaning siphon. Signs and symptoms
Excessive urination and extreme thirst and increased fluid intake (especially for cold water and sometimes ice or ice water) are typical for DI. The symptoms of excessive urination and extreme thirst are similar to what is seen in untreated diabetes mellitus, with the distinction that the urine does not contain glucose. Blurred vision is a rarity. Signs of dehydration may also appear in some individuals, since the body cannot conserve much (if any) of the water it takes in.Extreme urination continues throughout the day and the night. In children, DI can interfere with appetite, eating, weight gain and growth, as well. They may present with fever, vomiting or diarrhea. Adults with untreated DI may remain healthy for decades as long as enough water is consumed to offset the urinary losses. However, there is a continuous risk of dehydration and loss of potassium that may lead to hypokalemia. Cause
The several forms of diabetes insipidus are:

Central
Central (or Neurogenic) DI has many possible causes. According to the literature, the principal causes of central DI and their oft-cited approximate frequencies are as follows:

Idiopathic – 30%
Malignant or benign tumors of the brain or pituitary – 25%
Cranial surgery – 20%
Head trauma – 16%

Nephrogenic
Nephrogenic diabetes insipidus is due to the inability of the kidney to respond normally to vasopressin.
Harm to self
Suicidal thoughts are common in morbid jealousy, especially because of its association with depression and substance abuse. Risk to others
Violence can occur in any relationship tainted with jealousy, either normal or morbid jealousy. In a recent study of jealousy by Mullen & Martin in 1994, 15% of both men and women reported that at some time they had been “subjected to physical violence at the hands of a jealous partner.” Culturally, jealousy may be even used to “justify violence towards partners.” Victims in a homicide case are most likely to be current or ex-partners in both female and male perpetrators. When a partner repeatedly denies infidelity, this may provoke anger and extreme violence. On the other hand, the partner that is suffering may give up and give a false confession, which in turn most likely will provoke rage in the jealous individual. In the U.S. a sample was taken of 20 participants with delusional jealousy. 19 were male and Silva (1998) found that 13 had threatened to kill their spouse because of their perceived infidelity. Of the 13 males, nine actually attacked their spouse. Out of the 20, a weapon was used by three of them, and 12 had harmed their spouse. A presence of paranoid delusions and hallucinations of injury to the spouse were most often associated with violence. This suggests that individuals that suffer from delusional jealousy that partake in violence may be solely driven by psychotic phenomena. A higher risk of assault was associated with alcohol consumption.