Stay up late for a month, may cause immune disorders, endocrine disorders, increase the risk of heart disease, easy to cause high blood pressure, neurasthenia and other diseases. 1. Immune dysfunction: long-term stay up late can reduce the body’s immunity, prone to disease, such as frequent acute upper respiratory tract infections, etc., suffering from chronic diseases of the population, easy to cause recurrent disease. 2. Endocrine disorders: long-term staying up late can cause endocrine disorders, such as acne, facial blemishes, dull skin, irregular menstruation, and even amenorrhea. 3. Increase the risk of heart disease: long-term stay up late to increase the chances of heart disease, such as coronary heart disease, angina pectoris, arrhythmia, etc., in serious cases, may cause sudden death. 4. Hypertension: often stay up late can cause endocrine disruption, hormone secretion abnormalities, may cause hypertension. 5. Neurasthenia: often stay up late, can cause poor sleep quality, daytime sleepiness, leading to the occurrence of neurasthenia, if serious, may cause depression. Staying up late is more harmful, it is recommended to live a regular routine, eat on time, rest on time, so as not to damage human health.