Not eating can cause low blood pressure, but it is usually only people who do not eat for a long time that cause low blood pressure. If you don’t eat for a long time, your body will lose weight, and if you don’t have enough energy for a long time, the pressure in your blood vessels will drop, which is why people who don’t eat for a long time have low blood pressure. Long-term non-eating, the body’s energy sources will be insufficient, insufficient energy sources will cause the body a series of activities to reduce, will cause the body’s metabolic rate to reduce, will cause the gastrointestinal tract function to reduce, but also affect the normal work of the brain nerve center, because not eating leads to no source of sugar, the body glucose content is reduced, the brain work will be inhibited. If one or two meals are not eaten occasionally, blood pressure will not be lowered, mainly because blood pressure is controlled by the brain center.