Low blood pressure in the elderly may be due to age-related vascular elasticity reduction and degenerative valve diseases. 1. Reduced vascular elasticity: with age, vascular elasticity gradually aging, the elderly vasoconstriction function appears to be a substantial decline in the generation of low pressure is related to the elasticity of the large arteries, so the elderly low pressure (diastolic blood pressure) will also be reduced. 2. Degenerative valvular disease: many elderly people with increasing age will have degenerative valve disease, such as aortic valve closure insufficiency, which will make the diastolic blood pressure is also greatly reduced. Due to the above two reasons in the elderly prone to low blood pressure, if the low pressure is too low resulting in an increase in the difference between the pulse pressure will bring about certain damage, so usually need to pay attention to the blood pressure situation.