What Are the Symptoms of Dehydration in a Child?

Even a minor stomach infection or a heatwave can lead a little one into dangerous dehydration. A child's body loses fluids much faster than an adult's, and the first warning signs can be easy to miss. Find out which symptoms should immediately raise your concern and how to hydrate your child correctly and safely at home.

What Can Cause Dehydration in a Child?

A little one's body is made up mostly of water, and because reserve mechanisms are not yet fully developed, it is extremely prone to rapid fluid loss. The most common cause of sudden fluid loss is infection, but environmental factors and everyday care habits can also be to blame.

• Acute gastrointestinal infections (so-called stomach flu) – viruses (rotaviruses, noroviruses) or bacteria that cause troublesome vomiting and heavy, watery stools.

• High fever – speeds up breathing and increases sweating, causing water to literally escape from the body.

• Heatwaves and insufficient fluid intake – small children cannot always tell you they are thirsty or reach for a cup on their own, which becomes dangerous on hot days.

• Chronic illnesses – such as diabetes, kidney defects, or absorption disorders.

• Problems with swallowing – painful teething, mouth ulcers, or a sore throat, which effectively discourage a little one from drinking.

What Are the Types of Dehydration in a Child?

Dehydration involves not only the loss of water but also the loss of minerals that are crucial for health. Depending on whether the body loses proportionally more fluids or more mineral salts (mainly sodium), we distinguish three basic states.

What Are the Degrees of Dehydration in a Child?

Doctors assess the severity of the problem primarily on the basis of the percentage loss of the child's body weight. Since precise weighing at home during an infection can be difficult, it is worth knowing the three main phases in which this condition develops.

• Mild degree (body weight loss below 3%) – It manifests as increased thirst and slight irritability. It is relatively easy to manage at home.

• Moderate degree (body weight loss from 3% to 9%) – The child becomes noticeably weakened, its skin loses elasticity, and crying is accompanied by far fewer tears than usual.

• Severe degree (body weight loss above 9%) – A directly life-threatening state involving extreme exhaustion, apathy, and even impaired consciousness.

What Are the Symptoms of Dehydration in a Child?

A child's body sends very clear alarm signals when it starts to run short of fluids. As a parent, you must act without unnecessary delay, so regularly monitor your little one's behaviour, the condition of their skin, and the contents of their nappy.

• Infrequent urination. A dry nappy for more than 3 hours in an infant, or dark yellow, strongly smelling urine in an older child.

• Dryness in the mouth. Dry mucous membranes, chapped lips, and sticky saliva.

• Crying without tears and visibly sunken eyeballs.

• A sunken fontanelle (in infants).

• Loss of skin elasticity. A fold of skin gently pinched on the tummy does not spring back into place immediately, but flattens out slowly.

• Prolonged capillary refill time. After pressing on the nail bed until it turns pale, the pink colour returns after longer than 2 seconds.

• A sudden change in behaviour. Unusual, intense apathy, floppiness of the body, constant drowsiness, or the opposite – extreme irritability and restlessness.

What to Do in Case of Dehydration in a Child?

The key to treating dehydration at home is to give fluids in very small portions, e.g. with a teaspoon or a syringe every few minutes, which helps prevent triggering the gag reflex. The best choice is oral rehydration solutions (electrolytes) from the pharmacy, which precisely replenish mineral and glucose deficiencies, whereas sweet juices, fizzy drinks, or fatty broth can only worsen stomach problems.

Breastfed infants should be put to the breast as often as possible, without giving up natural feeding. Remember to constantly monitor your little one's general well-being as well as the amount and colour of the urine they pass.

When Should You Take a Dehydrated Child to Hospital?

If a child categorically refuses to take fluids, vomits absolutely everything they drink, or shows signs of severe dehydration (such as drowsiness that is hard to interrupt or floppiness of the body), go to the nearest emergency department immediately. In hospital, the medical staff will quickly and safely correct the deficiencies using intravenous drips or a nasogastric tube.

Do not wait for things to escalate, especially in newborns and infants. – in the youngest children, this condition progresses very rapidly and poses a direct threat to their health and life.