Sun & blemish-prone skin: understanding the rebound effect

In summer, many people observe an apparent improvement in their skin: pimples dry out, pores are less visible, and their complexion is more even. But a few weeks later, blemishes often return more pronouncedly. This is known as the rebound effect. Let's take a closer look.

The immediate effects of the sun on blemishes

Exposure to the sun, particularly to UVB rays, has immediate effects on acne-prone skin:

• Anti-inflammatory effect: UV rays temporarily reduce inflammation, which can alleviate redness and acne lesions.

• Transient sebum regulation: the skin dries out, sebum production decreases, and pimples appear to recede.

• Tanned complexion: pigmentation visually conceals marks and irregularities.

This phase gives the illusion of clearer skin. But it hides an ongoing imbalance.

What is the rebound effect?

The rebound effect corresponds to a resurgence of blemishes 2 to 6 weeks after sun exposure, often as autumn approaches. It is explained by several cutaneous mechanisms:

Thickening of the stratum corneum

UV rays stimulate keratinocyte production, which thickens the epidermis. This phenomenon, called hyperkeratinization, disrupts the natural evacuation of sebum and dead cells. Pores become clogged, forming microcysts and blackheads.

Sebum overproduction

The skin, dried out during the summer, reacts by producing more sebum to compensate. This excess, combined with skin thickening, promotes inflammatory flare-ups.

Delayed inflammation

Returning to a normal skin rhythm is often accompanied by residual inflammation: red, painful pimples, sometimes localized in previously calm areas.

How to limit the rebound effect?

While the rebound effect is a biological process that is difficult to avoid, it can be mitigated by adopting a few key habits before, during, and after sun exposure.

1. Effectively protect the skin

Adapted sun protection remains the first preventative measure. Choose a non-comedogenic and light formula, specifically designed for acne-prone skin. It limits UV-induced inflammation and preserves skin balance. Remember to reapply every two hours in case of direct exposure.

2. Hydrate, without oversaturating

Contrary to popular belief, oily skin needs hydration. A lack of water can lead to seborrheic compensation, worsening blemishes. Opt for light textures based on hyaluronic acid or glycerin.

3. Focus on an anti-inflammatory diet

Favor foods rich in antioxidants, omega 3, and zinc (berries, fatty fish, legumes, nuts, etc.) and limit ultra-processed, sugary, or overly dairy products that can disrupt the skin flora.

4. Integrate a gentle and targeted routine

After summer, skin needs balance and consistency. A simple, non-irritating, and well-formulated routine helps limit inflammatory recurrences. At Seasonly, we have designed treatments adapted to this transitional phase: a Cleansing Oil to cleanse without aggressing, an Anti-Dullness Peeling Mask to gently exfoliate and restore radiance, and an Blemish Serum based on bakuchiol and niacinamide to regulate sebum and soothe breakouts. Minimalist and effective formulas, designed to accompany acne-prone skin without stressing it.

In summary

The rebound effect is not an inevitability, but a sign that the skin is trying to regain its balance after a summer disruption. A regular skincare routine, based on well-tolerated active ingredients and gentle exfoliation, helps to get through this period by limiting the appearance of blemishes.