Hypotension is defined as low blood pressure in adults when the high pressure is less than 90mmHg and the low pressure is less than 60mmHg. Low blood pressure can cause a number of hazards to the body: 1. For example, low blood pressure can lead to insufficient capillary filling pressure, which can cause, for example, coldness and numbness at the end of the extremities due to inadequate blood supply to the capillaries. 2. It can also cause a series of insufficient blood supply to the heart, such as chest tightness, shortness of breath, palpitations, precordial discomfort and other conditions.