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Heat intolerance: signs to watch out for (and how to deal with them)

Intolérance à la chaleur : les signes à ne pas ignorer (et comment y faire face)

Romane B. |

Did you know that nearly 1 in 3 people feel unwell as soon as the temperature rises above 30°C? 🔎 If you also experience headaches, overwhelming fatigue, or hot flashes as soon as the weather gets warm, it's not just “in your head”: you may well have heat intolerance.

It's a little-known but very real phenomenon—and it can really ruin your summer. Don't panic: we'll explain how to recognize the signs, understand where it comes from, and, most importantly, how to adapt your daily routine to make it more bearable. The goal: to feel good even when the mercury rises.

Heat intolerance: what exactly is it?

Heat intolerance is not a disease per se, but an abnormal or excessive reaction of your body to high temperatures. Your body is unable to regulate its internal temperature properly, which can trigger a whole host of unpleasant, even worrying symptoms. This hypersensitivity can develop gradually or have been present all your life.

Do you often find yourself saying, “I can't stand the heat”? You're not alone. Some people are more sensitive than others, particularly due to their metabolism, certain chronic conditions (such as multiple sclerosis), or simply their constitution. Heat hypersensitivity is also more common with age and in children.

The most common symptoms

Here is a list of signs to look out for if you think you may be suffering from heat intolerance:

  • Intense fatigue or feeling exhausted as soon as it gets hot
  • Dizziness, nausea, or lightheadedness
  • Feeling of oppression or general malaise
  • Heat hives: small red bumps and itching
  • Excessive sweating or, conversely, lack of sweating
  • Headaches, fever, or signs of heat stroke
  • Symptoms of heat exhaustion: chills, confusion, vomiting

In summary: if you experience constant fatigue and heat, heat discomfort, or feelings of malaise as soon as the temperature rises, your body is sending you a clear message: “take a cool break now.”

Why are some people more sensitive?

There are many reasons why some people cannot tolerate heat. In addition to chronic illnesses, certain medications, hormonal disorders, or nervous system disorders can increase this intolerance. Sometimes it is simply a case of hypersensitivity to heat due to poor acclimatization or sudden exposure to high temperatures.

How can you limit the symptoms of heat intolerance?

Stay in the shade (but not under the duvet).

Avoid going out during the hottest hours of the day (between noon and 4 p.m.). Choose mornings or evenings for your activities, especially if you're exercising or gardening. Certain activities are ideal when it's hot: swimming, stretching, walking in the forest... anything that allows you to move without exhausting yourself.

Wear “heat-resistant” clothing

The key is to wear the right clothes. G-Heat's cooling and UV-protective clothing (text anchor: cooling and UV-protective clothing) is designed to keep you as cool as possible and protect you from UV rays. Ideal if you are prone to heat rash, heat hives, or any heat allergies.

Hydrate like never before

We can't say it enough: water is vital. Drink regularly, even if you're not thirsty. Avoid sugary or alcoholic drinks, which increase dehydration. A little extra tip: add a pinch of salt or opt for electrolyte solutions if you feel symptoms of heatstroke or the onset of heat exhaustion.

Listen to your body

If you experience signs of heatstroke such as chills, sudden fever, or mental confusion, don't ignore them. Lie down in a cool place, drink cool water, and seek medical attention quickly if symptoms persist. The symptoms of heatstroke can progress rapidly, especially in cases of sunstroke.

Mistakes to avoid

  • Wearing dark, tight-fitting clothing in direct sunlight
  • Going jogging in the middle of the afternoon
  • Ignoring heat-related fatigue
  • Not drinking for several hours
  • Thinking that heatstroke is just fatigue

G-Heat: your best ally against the effects of heat

At G-Heat, we've thought of everyone who struggles with the heat. Our technical UV-protective clothing is designed to provide a real solution to heat intolerance symptoms. You can move around, go for a walk, or even work outside without feeling like you're in an oven. All this with style, comfort, and above all, a real feeling of freshness.

If you feel like your body isn't coping well with the summer, don't wait until you crack. Get equipped, adapt your lifestyle, and rediscover the pleasure of summer without heat stress. Because no, melting at 95°F isn't inevitable!