many people every year. Most often resulting from a viral or bacterial infection, it disrupts the delicate balance of the digestive system, leading to a series of unpleasant symptoms such as nausea, vomiting, diarrhea, and abdominal cramps. In cases of gastroenteritis, the rapid and frequent evacuation of bodily fluids can quickly exceed the body's ability to replenish them through usual fluid intake. This is particularly true if appetite is reduced, which is common when suffering from gastrointestinal issues. Furthermore, the body's ability to effectively absorb fluids can be compromised during this illness, making fluid replenishment even more difficult. This is why drinking water, and thus rehydrating, are essential aspects to provide the body with sufficient water both after and during these episodes.
Identifying Dehydration: Symptoms and Warning Signs
What is dehydration?
Dehydration is a state where the body loses more fluids and electrolytes than it takes in. This is a particularly concerning phenomenon during gastroenteritis. This digestive condition, often accompanied by vomiting and diarrhea, significantly accelerates the loss of bodily fluids. These symptoms not only lead to a loss of water but also a significant decrease in essential electrolytes such as sodium, potassium, and chloride, which play a fundamental role in maintaining normal bodily functions, including fluid balance, nerve transmission, and muscle contraction.

In this context, it becomes imperative to quickly recognize the signs of dehydration to avoid potential complications. This is all the more important in vulnerable populations, such as young children, the elderly, and those with chronic illnesses, in whom the effects of dehydration can be more rapid and severe.
How to recognize dehydration?
Here are some signs and symptoms to watch for to identify and prevent dehydration:
Dry mouth and tongue: This is an early and significant indicator of dehydration, especially in cases of gastroenteritis. This condition occurs when the mucous membranes of the mouth and tongue lose their natural moisture and become noticeably dry and sticky. This uncomfortable sensation is often accompanied by a decrease in saliva, making both swallowing and speaking difficult.
Reduced urinary frequency and dark urine: Normally, a healthy adult should urinate approximately six to eight times a day, but this frequency can significantly decrease when the body lacks fluids. This decrease in urinary frequency is a clear indicator that the body is trying to conserve the water it has, thereby limiting the amount of urine produced. When the body experiences dehydration, urine can take on a distinctly darker hue, ranging from dark yellow to amber. This coloration is due to a higher concentration of waste products and chemical substances like urea, which the kidneys filter from the blood. When the body is well-hydrated, these waste products are diluted in a larger quantity of fluids, making the urine clearer.
Unusual fatigue and lethargy: When the body lacks fluids, every cell and organ is affected, which can lead to extreme fatigue, lack of energy, and general weakness. Dehydration affects blood circulation and can reduce the supply of oxygen and essential nutrients to muscles and the brain. This can result in muscle weakness and decreased endurance, making physical activities more difficult.

Dizziness or lightheadedness: When the body loses a significant amount of fluids, blood volume can decrease, thereby reducing the pressure exerted by the blood on the walls of blood vessels. This drop in blood pressure can lead to an insufficient supply of oxygen and nutrients to the brain, causing dizziness or lightheadedness.
Our hydration tips during gastroenteritis
Drink liquids in small quantities
It can be difficult to consume large quantities of liquids all at once. Opt for drinking water in small, regular sips instead of large volumes of water or other liquids all at once. This allows fluids to be gently reintroduced into the body without risking worsening symptoms such as nausea or vomiting. Clear soups, vegetable broths, and herbal teas can help! There are also Hydratis solutions that will contribute to rehydration, while providing essential electrolytes that can be lost in cases of gastroenteritis. Water-rich fruits, such as watermelon or peach, can also be good sources of hydration, while being gentle on the digestive system.
Use Hydratis rehydration solutions

Hydratis is a hydration solution specially designed to meet the needs of people suffering from fluid and electrolyte imbalances, as is often the case during a gastro. Indeed, these carefully developed solutions offer a rich and optimal mixture of salts, sugars, and minerals that allow for rapid and effective water absorption. This will allow for rapid hydration without overloading or further irritating the digestive system. Our products are formulated to provide a precise balance between hydration and flavor, making them more pleasant to consume while being effective in boosting the body! For its use, we advise you to put one tablet in 250ml of water and take small quantities regularly, to be renewed throughout the day as soon as you feel the need (e.g., every 2-3 hours).
Avoid certain drinks
Drinks containing caffeine, such as coffee, tea, and some sodas, as well as carbonated drinks and very sugary fruit juices, can often worsen diarrhea symptoms and, consequently, exacerbate dehydration.
Prevention and daily hydration
Preventing dehydration is an aspect that can impact health, which must be taken into account and goes far beyond managing periods of illness. Indeed, adequate daily hydration plays a fundamental role in maintaining an optimal state of health and contributes to many aspects of physical and mental well-being. Insufficient fluid intake can lead to a variety of health problems ranging from fatigue and difficulty concentrating, to more serious problems such as kidney stones or hypotension. In case of signs of severe dehydration or if symptoms persist, medical consultation is imperative!
To effectively manage a gastro episode, stay vigilant for signs of dehydration and ensure the application of appropriate hydration strategies. Following these water losses, we indeed recommend drinking water regularly, throughout the day, and not just in response to thirst, which is often a late sign of dehydration! Our hydration solutions are designed to help maintain an optimal fluid balance, especially for active individuals or those living in hot climates where fluid loss can be accelerated. We invite you to visit pharmacies or our website hydratis.co and don't forget to hydrate well :)
Bibliography
National Library of Medicine. June 12, 2023. “Viral Gastroenteritis” - https://www.ncbi.nlm.nih.gov/books/NBK518995/
Améli. October 27, 2023. “Adult gastroenteritis: what to do?” - https://www.ameli.fr/assure/sante/themes/gastro-enterite-adulte/bons-reflexes-que-faire
Améli. December 6, 2023. “Dehydration” - https://www.ameli.fr/assure/sante/urgence/pathologies/deshydratation
National Library of Medicine. October 3, 2022. “Adult Dehydration” -https://www.ncbi.nlm.nih.gov/books/NBK555956/
Science Direct. September 21, 2023. “Emergency department assessment and management of children with gastroenteritis” - https://www.sciencedirect.com/science/article/pii/S2588994X23000696?via%3Dihub
en/en/