Answer: She should try drinking warm milk, a cup of chamomile tea, have a lavender infused bath or drink a glass of wine. Also the herb Valerian induces sleep without the side effects of doctors sleep meds. All of these mentioned are good, natural and cheap alternatives to generic medicine. also look online for herbal medicine, and other natural remedies to induce sleep.
Answer: This is a medical problem that should be disscussed with your doctor. They will probably write a prescription for Ambien CR of Lunesta. In some cases it might not require pills at all but rather a change in life style.
Answer: Since the dawn of time, humans naturally became adapted to waking when the sun rose, especially in the ages when electricity did not exist. Ancient peoples would rise with the sun and by sunset, be tired enough to sleep during the dark hours when visibility was low. If used to it, we can sleep during the day and be awake all night if we want.
Answer: As you have heard, heat or warm temperatures cause us to feel drowsy. Overweight people conduct their own heat with their fat, causing their own temperature to greatly increase, leading to their sleeping mode. or because they are human beings too, and we all need to sleep.
Answer: If your body does not receive environmental stimuli, then the brain may no longer concentrate on normal cognitive functions and will to a degree shut down - basically, it goes on stand-by mode until something good happens. Interestingly and to contrast if the brain is exposed to excessive stimuli (sensory overload) or to repetitive stimuli (repeated flashes of light for example) it will also shutdown.
Answer: In response to cold temperatures, blood vessels constrict to retain heat meaning less blood flows at any one point in the body, including the brain. Less blood flow in the brain decreases alertness, making it easier to fall asleep.