I always feel tired and want to sleep. Cancer.

Always feel tired, more consideration is work pressure, often stay up late, sleep time is not enough caused. It is also likely to be caused by anemia. When the body anemia, brain ischemia, hypoxia symptoms are particularly obvious, of course, malignant tumor is likely to lead to anemia. Finding the cause of anemia and eliminating, is the key to treatment. In addition, thyroid function is low, but also makes patients feel weak, drowsy all day.