4. You feel thirsty all the time
As you may have noticed, this symptom has a correlation with the previous two. Since the body keeps flushing out fluids, there will be a need to replenish them. As such you will feel constantly thirsty, which is a message from your body that it is lacking in its vital fluids. Your body will ask you for more and more water, and the dehydration will rarely, if ever, cease.