A low blood pressure of 68 mmHg is generally considered normal. Normal adult blood pressure is generally less than 140/90mmHg, and the high value of normal blood pressure refers to systolic blood pressure between 120-139mmHg and diastolic blood pressure between 80-89mmHg, while the normal ideal blood pressure refers to blood pressure less than 120/80mmHg. low pressure, also known as diastolic blood pressure, has a normal range of 60-89mmHg, with the most ideal range being 60- 80mmHg, so a low pressure of 68mmHg is normal. Blood pressure is often affected by many factors. It is recommended to have a low-salt, low-fat diet, quit smoking and limit alcohol, exercise properly, maintain an optimistic and positive attitude towards life, and pay attention to regular blood pressure monitoring.