Increase your salt intake. You may have heard that too much salt is bad for your blood pressure. However, this is only the case if you have high blood pressure; increased salt (or sodium) can raise your low blood pressure to a healthier level.More salt increases your blood volume, which will raise your blood pressure.ow blood pressure can accompany dehydration, so you may be able to raise your blood pressure by increasing your water intake. Aim to drink at least 8-10 8oz cups of water per day.