Signs & Symptoms Of Dehydration


Dehydration occurs when the body does not receive enough water. The body is practically sixty percent water. Individuals require water for digestion, breathing, and basically every single function of the body. Individuals could lose water rapidly via sweating excessively on a humid day or through a lot of exercises. The body could lose water via excessive urination as well. People can become dehydrated if they have diarrhea, are vomiting, or have a fever. Dehydration could be severe; luckily, there are several ways to determine if someone is dehydrated. They may display symptoms even with minimal water loss. Dehydration by as little as one or two percent could lead to signs and symptoms.


The skin eliminates water through sweating when it is hot. Individuals also lose moisture via skin in cooler weather due to the air being drier. Assess the skin for signs of dehydration like shrinking or tightening; reduce plumpness of skin and clammy and cold skin. Also look out for cracked skin or lips, redness or flushing, and roughness or flaking.


The mouth including the tongue might have a sticky or dry sensation when an individual is dehydrated. They may even have bad breath as well. The body requires massive amounts of water to make spit or saliva. When individuals are dehydrated, they have reduced amounts of saliva. This results in more additional bacteria growing in the mouth. Brushing the teeth and consuming loads of water assists in getting rid of odor-causing bacteria.


Individuals might be capable of determining if they are dehydrated by looking at their urine. Amber to dark yellow urine indicates individuals might have mild to severe dehydration. They could typically tell if they have healthy hydration levels in the event their urine has a light color. When dehydrated the individual urinates less frequently than what they are accustomed to.


Dehydration could result in or worsen constipation. Individuals might have difficulty with bowel movements or they could be reduced movements. This occurs if they are not getting adequate amounts of water. Their stool might appear dry or resemble tiny lumps. Water is required to assist in the digestion of food and transport waste through the digestive system. Consume loads of water in order to remain regular.

Hunger & Thirst

Individuals might feel hungrier when they are dehydrated. Thirst is also a signal that the body requires extra water. A medical review discovered that adults who experienced dehydration often had a bigger body weight. Additional research is required on the connection between hunger and dehydration. Receiving plenty of water might aid in the reduction of food cravings. Adults who weigh more usually require more water to remain hydrated.

Blood Pressure

Approximately fifty-five percent of the blood is liquid. Loss of water could reduce the blood volume and impact blood pressure. The American Heart Association stated that dehydration is a cause of lower blood pressure. Consuming water aids in the balance of blood pressure.


Medical research discovered that dehydration could make individuals feel tired although they might have rested. Males in the study on dehydration stated that they felt tiredness, lethargy, and fatigue. Symptoms like these might be due to low blood pressure as a result of dehydration. Being hydrated properly assists in the increase of energy levels.


Individuals might have headaches even if they are slightly dehydrated. A research study discovered that females who were just over one percent dehydrated experienced headaches. The pain from the headaches might be associated with low blood pressure because of the loss of water. Consuming water might assist in raising the blood pressure and lead to an easing of the symptoms.

Nausea & Fainting

Dehydration could result in dizziness and fainting. Nausea might result in vomiting. This leads to even more loss of water, and symptoms becoming worse. Nausea might be associated with low blood pressure as a result of being dehydrated as well. Dehydration that is severe could result in fainting. Individuals might have a lightheaded sensation or faint when they stand up too quickly after lying down or sitting. These symptoms might occur when dehydration reduces the blood pressure and volume of blood.

Heart Effects

Dehydration could result in a heartbeat that is pounding. A rapidly beating heart and fast breathing might be a signal of severe dehydration. Loss of water results in the volume of blood being lower. This makes the heart operate harder to transport blood throughout the entire body. The volume of blood increases and the heart rate returns to normal when the individual starts to become hydrated again.

Brain Function

The brain consists of more than seventy percent water. Research on males in their twenties discovered that dehydration retards several kinds of brain function. It could impact memory, concentration, and alertness. Participants in the study made more mistakes on memory and vision tests when experiencing dehydration. A different study discovered that even mild dehydration could result in mistakes while driving. This includes delayed reaction time while braking and drifting across lanes. The results revealed that driving while dehydrated could deteriorate driving skills as much as alcohol levels at the legal limit. It is also comparable to driving while being sleep-deprived.


Medical research discovered that dehydration might make the brain more vulnerable to pain. Males in the study displayed more pain activity in the brain when being dehydrated as compared to when fully hydrated.


Research on both males and females discovered that dehydration made individuals feel depressed, tense, or anxious. Adults stated that their mood was lower. Completing tasks appeared to be more challenging when they were dehydrated. Signs of serious dehydration include mood changes, such as irritability or confusion.