When running, some people may feel itchy legs, which can be very uncomfortable. Just start running and your legs start itching and getting red. But do you know why this happens?

First of all, itchy legs when running can occur for several reasons, so we have separated the main ones:

Itchy legs when running: vasodilation

One of the main causes of itchy legs is vasodilation, which occurs when blood vessels dilate and there is an increase in the amount of blood in the area. Consequently, the feathers start to itch.

But the good news is that there is nothing to worry about, because this is normal.

Read also: Hyperhidrosis: How to deal with excessive sweating

Cholinergic urticaria

Cholinergic urticaria is basically an allergy to sweat, so the condition is triggered when the body temperature gets too high, especially during physical exercise.

"Some of the factors that trigger itching or irritation are changes in the pH of the skin (which can expose certain parts of the body to bacteria), as well as difficulty in the complete evaporation of sweat. perspiration ", explains dermatologist Priscila Câmara de Camargo, from the Camargo Clinic.

Contact dermatitis

Contact dermatitis is also called contact eczema, an inflammatory condition on the skin that arises from contact with substances that can cause irritation or allergy.

Thus, some runners may be prone to itchy legs during running because of contact dermatitis.

Although the problem is not directly related to physical activity, running, for example, can contribute to contact dermatitis, either from the product used to wash the clothes or the fabric.

Source: Priscila Câmara de Camargo, from the Camargo Clinic.

Reference: Marcio Atalla .