Men who go to bed at 12 o’clock at night may be able to interfere with the endocrine test on day 2, which should also be judged on the basis of the specific test. Some tests may not be affected by sleep. If you stay up late, have poor sleep or insomnia the night before the test, it may affect the pituitary gland’s secretion of hormones such as adrenocorticotropic hormone, luteinizing hormone, thyroid stimulating hormone, melatonin, etc., and it may also cause the levels of hormones such as thyroid hormone, adrenocorticotropic hormone, adrenal hormone, sex hormone, etc., which will result in the result of the next day’s endocrinology test that may not be able to reflect the real situation well. There are also some tests that may not be affected by sleep, such as the glycated hemoglobin test, which should also be judged according to the specific test. If you are going to have the endocrine test on the second day, you should adjust your mindset, avoid staying up late, ensure enough sleep, and do not be under too much mental stress. Detailed precautions for endocrine examination should be consulted with your doctor.