A low blood pressure of 56mmHg is important and is not normal. A low blood pressure of 56mmHg is below normal, but the drop is not very serious. Normal blood pressure is between 90-140mmhg, if the low pressure is 56, it means that the blood pressure is low, which is not normal. Normal blood pressure is a prerequisite for blood circulation, which is regulated by a variety of factors and provides various organs and tissues to maintain adequate blood volume or normal metabolism. Blood pressure that is either too high or too low is abnormal, and both can have serious consequences. Especially in elderly patients, due to the significant reduction in the elasticity of the arterial wall, diastolic pressure, i.e., hypotension, tends to decrease, and systolic blood pressure increases significantly, known as simple systolic hypertension, which is directly related to the reduction in the elasticity of the blood vessel wall and requires timely diagnosis and treatment. In addition, low pressure, if often 56mmHg, it is recommended to go to the regular hospital in time, and improve the supine blood pressure and endocrine hormone examination, clear diagnosis and treatment.