L'Eryplast en cas d'érythème fessier.

How does Eryplast work on nappy rash?

Eryplast is a water-based paste recognised as a standard treatment for nappy rash. What is its mechanism of action and how should it be used? Continue reading to learn more about Eryplast.

Summary
Published March 13, 2025, updated on March 13, 2025, by Pauline, Chemical Engineer — 5 min read

Nappy rash: what is the function of Eryplast?

Nappy rash, also known as diaper dermatitis, is a skin inflammation that occurs on the buttocks, groin, and thighs. Nappy rash results from prolonged exposure to moisture, repeated friction, or an infection caused by bacteria or fungus. Nappy rash primarily affects babies and children. Indeed, this inflammation particularly develops in warm and humid environments, such as nappies. Therefore, wearing these is a factor in the onset of nappy rash. It is mainly characterised by redness, although in some cases, the skin can become more sensitive and cause burning and itching sensations. A nappy rash that is quickly addressed poses no risk. However, without treatment, it can progress to a more severe form, with the emergence of blisters and bleeding.

Most of the time, the management of nappy rash is done by applying a zinc oxide-based treatment, such as Eryplast.

This molecule operates on several levels to soothe the skin and curb nappy rash. Zinc oxide is primarily known for its anti-inflammatory properties and its ability to inhibit the expression of certain pro-inflammatory cytokines responsible for redness and skin irritation. It also promotes skin healing by encouraging collagen synthesis. Another interesting property of zinc oxide: it tightens the skin tissues, which limits the absorption of moisture and thus prevents maceration, a factor that can exacerbate the nappy rash.

Finally, zinc oxide is capable of forming a protective barrier on the skin's surface, thereby reducing friction and preventing the emergence of new lesions. This action of zinc oxide also prevents bacteria, fungi, and other pathogens from colonising the skin. It thus prevents the risks of secondary infection, a phenomenon that can complicate nappy rash. Also found in the formulation of Eryplast is glycerine, a molecule known for its humectant action, as well as its anti-inflammatory and healing properties.

Did you know? Eryplast is also referred to as "water paste" because it does not contain oil, allowing moisture to evaporate more swiftly.

Eryplast is ideally applied after each nappy change and has no specific contraindications, whether it's used on young children or by pregnant women. However, it's important to note that if nappy rash does not improve or worsens after four days of regular Eryplast application, it is recommended to seek a doctor's advice.

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