Most times some people fall sick due to the constant use of the screen,
This I can agree with. Too much screen time can lead to malaise and also mess up one's circadian rhythm. I know a friend who sleeps throughout the day and is fully alert at night just because of how often he uses his phone at night.
That's kind of better because most times at night sleep definitely comes. But there are some who don't sleep at day and even night.
They just sleep once a week, I have an uncle who did something like this and within some weeks he was admitted to the hospital for five months which cost him alot of money.
Since then he stopped that act till date.