Neurasthenia means insomnia, difficulty in falling asleep or waking up early, such as lying down for 20-30 minutes, or waking up early the next day, that is, after midnight, instead of waking up at normal waking hours, such as 3:00-4:00 in the morning and waking up at 1:00-2:00 in the morning. This is called neurasthenia. Neurasthenia can be physiological or pathological, and it may occur with the increase of age.

In addition, neurasthenia can cause anxiety and depression, especially when suffering from anxiety, which may be a sign of neurasthenia. Death is lethargy and wakefulness. In the past, people generally went from lethargy and lethargy to coma, and coma was mild coma, moderate coma to severe coma. Severe coma was a symptom before death, so they would not die if they couldn't sleep, but they would die if they slept too much.