The hazards of sleeping late can lead to endocrine disorders, cardiovascular diseases and eye diseases. 1. Endocrine disorders: sleeping late may affect the ovaries to secrete estrogen and progesterone, thus causing endocrine disorders, leading to menstrual irregularities. Staying up late for a long time is one of the main reasons for menstrual cycle disorders, and serious menstrual disorders may lead to infertility. 2. Cardiovascular disease: Long-term late nights lead to sympathetic nerves in a state of excitement for a long time, at this time the heart rate is accelerated, blood pressure rises, and the heart load is greater. Long-term late night can lead to myocardial ischemia, heart attack and other diseases. 3. Eye diseases: prolonged eye use may lead to dry eyes, eye fatigue, the most common is to lead to myopia, dry eye, conjunctivitis and so on. Long-term late to bed is a bad habit, may have a great impact on the health of the body, so it is recommended that women who have the habit of sleeping late, try to develop a regular routine, so that early to bed and early to rise.