This sleep disorder is associated with disturbances of circadian rhythms.
Often people who just physically can’t Wake up in the morning and start our day, blame laziness, but it can be a symptom of the disease that is called “Diana” or “syndrome of delayed sleep phase”. In this disorder the person falls asleep very late (often closer to morning) and very late to rise (closer to noon). Attempts to get up early to do some necessary things, only lead to sleep deprivation, sleepiness, reduced productivity, but not to a shift in the sleep period at a normal time. While suffering from disan if they can’t get up in the morning, often sleep longer than necessary for the person seven-eight hours. This leads to the fact that the person is actually “drops of life”, since its existence is inconsistent with the mode of life of the society, reports Full article can be read here https://ukr.media/medicine/377716/