Weak, headache, thirsty? How do you prevent sunstroke?


“Stay out of the sun, avoid physical activity during the hottest time of day and have plenty to drink: with these three guidelines you will easily survive a hot sunny day and avoid sunstroke – or even worse: heatstroke”, says An De Sutter, head of general medicine (Faculty of Medicine and Health Sciences).

Your body has many ways to warn you that you are becoming overheated. An: “You start to sweat and your heart beats faster. When you sweat a lot then you lose salt as well as moisture. If your body lacks moisture it struggles to get cool and you therefore heat up even more. A salt deficiency can cause muscle cramps. You get a headache, feel floppy and can even faint.” 

In that case you are probably suffering sunstroke. Fortunately, at that moment, you can still do something to prevent things getting worse. An: “Then the message is: cool down and drink! Get out of the sun immediately and find some shade or a cool room. Drink small sips of water or a sports drink, because a lightly sugared or salty drink will be absorbed more quickly by the body. Absolutely no alcohol or coffee.


Salty food

“Eat salty biscuits or crisps to rectify the lack of salt. Someone fainted due to the heat? Remove excessively hot and tightfitting clothing and put their legs in the air”, advises occupational physician Lut Braeckman. “What you certainly must not do is to underestimate the danger”, she stresses. “After all, however young or old you may be and whatever your state of health, high temperatures will put your body under pressure”, confirms An.

Heat stroke

Worst of all is heatstroke, because it is life-threatening. An: “Heatstroke is a form of overheating whereby your body temperature exceeds 40 degrees. That means you are in danger, and risk nausea and vomiting, neurological complaints such as confusion and fits, a racing heart and even a coma.”

In the case of such symptoms you must go straight to the accident and emergency department. In the meantime you can help someone with heatstroke by trying to cool them down as much as possible. “For example, by cooling the body with wet clothes. The water can be cool but definitely not ice cold, because then there is too much difference compared to the person’s body temperature”, advises An.

Children are more sensitive to heat

Unfortunately there are fatalities in every heat wave, many of which are vulnerable elderly people with other ailments. But children and babies too are more at risk when exposed to the sun for long periods. “In children, the thermoregulation system is not yet fully developed, which is why they are more sensitive. Also, when they are busy playing they do not pay attention to drinking enough”, confirms Lut.

An: “And babies should be kept out of the sun entirely and should wear a bonnet. Children heat up more quickly, which is why you should never leave children in the car, even for a few minutes!” Also handy to know: if you take diuretic medicine you should pay extra attention and drink plenty. In any case, it can do no harm to check with your doctor what you need to watch out for, as other medication can also make you more sensitive to heat.


Keep an eye on the UV index

In fact, it is always worth listening to the weather man during the hottest summer days. “When the UV index reaches 3 or 4, you need to watch out not to remain in the sun for too long, as you will burn more easily”, says An. Humidity can also be important. Lut: “The more muggy and moist the air, the more you will struggle to cool down, because you are unable to sweat properly.”

T-shirt with long sleeves

As an occupational physician, Lut advises employers and employees on heat measures. “At Ghent University the working hours can be changed in the case of a heatwave, and I think that’s a good solution. Another example is to allow extra breaks”, says Lut.

Of course, there are lots of people who work outdoors, for example, in the building industry. Lut: “I advise employers to provide sun cream or to install parasols, so that people are not required to work in the direct sun. I advise employees to wear a T-shirt with long sleeves and a hat.”

An De Sutter

Professor An De Sutter chairs the Center for General Medicine in the department of Public Health and Primary Care. “As a general practitioner, on warm weekends, we do see people arrive at the practice who are suffering sunstroke. Personally, that is something I have never experienced. I have never had sunstroke, because sitting in the sun is nothing for me.”

Lutgart Braeckman

Professor Lutgart Braeckman (faculty of Medicine and Health Sciences, department of Public Health and Primary Care) specialises in occupational medicine. “I too prefer the shade on a hot day. I also ensure that I drink plenty of water.”

Summertime reads

Our researchers share their knowledge on summery themes. Read about sunscreen, succesful queuing at festival bars, how you can make it through summer without smelling of sweat, and much more.

Read also

This is how to avoid parasites on holiday

Holidays! You're already looking forward to all the delicious things you'll eat while travelling, but wait ... Can you just eat anything? "There are some foods that you need to be a bit careful with.” Professor Sarah Gabriel tells us how to avoid taking an extra passenger back home


Revolution in plastic surgery: human tissue rolls out of printer

Creating new pieces of bone, muscle, skin or fat with a 3D printer to heal injuries. Sounds futuristic? The first steps are already being taken today! We spoke with plastic surgeon and professor Phillip Blondeel about his research into tissue engineering.

3D Bioprinter

Most skin cancers can be prevented: protect yourself from UV with these 4 tips

Sunshine and holidays equal a tanned skin for many. But we need to adjust our ideas about tanning, according to dermatologists Lieve Brochez and Isabelle Hoorens. Our behavior towards the sun and UV will cause more and more cases of skin cancer in the coming years.


Is a stool transplant a potential treatment for Parkinson’s?

A recent study into Parkinson’s disease has shown that a stool transplant may constitute a new and valuable treatment of the disease. “It offers a potentially safe, effective and cost-efficient way of alleviating the symptoms and improving the quality of life of millions. A 'bacterial pill' might replace the stool transplant in the future. But more research is needed.”

Professor Vandenbroucke en Santens