Sleep deprivation can cause dizziness, memory loss and other discomforts that can also affect the results of the physical examination. Lack of sleep may affect the results of electrocardiogram, such as arrhythmia, premature ventricular contraction, sinus tachycardia, etc. Lack of sleep may also lead to elevated blood pressure and affect the results of the physical examination. In addition, lack of sleep may affect the results of liver function tests, because the repair of liver function and regeneration of liver cells are completed in sleep, if sleep deprivation may lead to a mild increase in certain indicators of liver function. If you are preparing for a medical checkup, eat a light diet the night before the checkup, do not eat spicy and stimulating food, do not drink coffee, do not drink alcohol, do not eat after 12:00 pm, do not eat, do not drink, do not stay up too late, and do not be tense during the medical checkup, because being too tense will affect the results of the medical checkup.