Drink water and add restrictions on how much to drink.
Answer: Insomnia
Explanation: Insomnia is considered as a sleeping disorder .In this case the person having disorder is not able to fall asleep or not able to stay asleep. The symptoms like sudden waking up from sleep at night hours, early waking up during morning time, not able to go back to sleep etc.
Other options are incorrect because enuresis is the lack in control of bladder, narcolepsy is falling asleep in a calm and relaxing environment and REM sleep behavior disorder defines act of coming out from the intense dreams.Thus, the correct option is insomnia
Causes temporary weight gain due to intake of more fluids. When you eat salts, they absorb more water in the body, making one look/feel more "full", which can cause a temporary gain in weight when stepping on a scale. For clarification, the weight temporarily gained if referred to as "water weight"