Sun acne: understanding and preventing post-summer acne breakouts

After several weeks of sun exposure, skin may appear clearer and blemishes less visible. However, this improvement is often temporary. At the end of summer, pimples, blackheads, and microcysts can reappear: this is commonly known as rebound acne after sun exposure.

Why can the sun promote this phenomenon? How can you prevent blemishes when school starts again? Dr. Sylvie Peres, dermatologist and co-founder of Alaena, explains the cutaneous mechanisms involved and the actions to adopt.

What is solar acne?

The term "solar acne" is commonly used to describe blemishes that appear during or after a period of sun exposure. However, it covers several phenomena.

During the summer, UV rays can give a temporary impression of acne improvement, especially because certain inflammatory lesions become less visible. But sun exposure also promotes oxidative stress, inflammation, and thickening of the stratum corneum.

This hyperkeratinization can disrupt the normal evacuation of sebum and promote the obstruction of pilosebaceous follicles. When exposure decreases at the end of summer, the comedones and microcysts that have gradually formed become more visible: this is the phenomenon commonly called rebound acne.

The sun is therefore not a treatment for acne. Skin that appears clearer during the summer is not necessarily skin whose underlying mechanisms for blemishes have normalized.

Why do we get more pimples after summer?

Acne is a chronic inflammatory disease of the pilosebaceous follicle. Several biological mechanisms contribute to its development: sebum production and composition changes, follicular hyperkeratinization, inflammation, and imbalance of the skin microbiome.

After repeated sun exposure, the accumulation of dead skin cells can promote pore obstruction. When school starts again, previously less visible blemishes can then appear as blackheads, microcysts, or inflammatory pimples, particularly on the face, décolleté, and back.

How to avoid rebound acne after sun exposure?

The goal is to gradually restore balanced skin function without aggressing skin that has been exposed for several weeks to UV, heat, salt, or chlorine.

1. Promote cell renewal with adapted exfoliation

Regular exfoliation helps eliminate dead cells accumulated on the skin's surface and limit pore obstruction. The Alaena Fruit Acid Peel, inspired by medical office peels, combines fruit AHAs to promote cell renewal, refine skin texture, and gradually unclog pores. After summer, it can be used up to twice a week depending on skin tolerance. Exfoliation should be done in the evening and accompanied by adapted sun protection during the day.

2. Target blemishes locally

On previously cleansed and dried skin, the Anti-Blemish Solution is applied in the evening to the affected areas.

It completes the ritual for blemish-prone skin by targeting areas where pores tend to become clogged. The goal is not to strip the skin, but to gradually support skin renewal while preserving its balance.

3. Support inflammatory pimples and their healing

When a blemish becomes inflamed, the priority is not to manipulate it.

The Repair Cream can be applied locally to the pimple and then during the skin repair phase. Its formula combines clay, tea tree, tamanu oil, and honey to support fragile skin and the skin's natural repair mechanisms.

4. Maintain adapted hydration for combination to oily skin

Blemish-prone skin also needs to be hydrated. Trying to completely eliminate sebum with overly degreasing products can weaken the skin barrier and maintain inflammation.

The Combination Skin Moisturizer combines hydration and natural active ingredients with high skin affinity. Its formula has been designed to meet the needs of combination skin: maintain hydration, limit shine, and preserve skin balance without weighing it down.

5. Act on blemishes from within

Skin balance does not depend solely on the products applied to its surface. Certain nutritional, metabolic, and inflammatory factors can also be involved in the mechanisms associated with blemishes.

The Alaena Anti-Blemish Food Supplement has been formulated to complement the action of topical treatments in an in & out approach. Its formula notably combines zinc, burdock, milk thistle, fumitory, nettle root, and rosemary to support combination to oily skin prone to blemishes.

Zinc contributes to the maintenance of normal skin and the protection of cells against oxidative stress. Combined with an adapted skincare routine, this internal action helps to sustainably support skin balance.

Dr. Sylvie Peres recommends a course of treatment of at least three months, in addition to a routine adapted for blemish-prone skin.

6. Daily UV protection for the skin

Photoprotection remains essential, even when the skin has imperfections. UV rays generate oxidative stress and can promote inflammation as well as the appearance or persistence of pigmented marks after a pimple.

A broad-spectrum sunscreen must therefore be applied daily during periods of exposure and reapplied regularly.

Should you exfoliate if you have acne?

Dr. Sylvie Peres: "Overly abrasive mechanical exfoliations should be avoided on inflamed skin. Friction can accentuate irritation and further weaken the skin barrier. I prefer controlled chemical exfoliation, particularly based on fruit acids, adapted to the skin's tolerance."

It is also advisable not to pick or squeeze pimples. These manipulations increase inflammation and the risk of post-inflammatory marks and scars.

What diet should be favored in case of acne?

Diet is not the sole cause of acne and does not replace dermatological care. However, certain eating habits can contribute to the overall balance of the skin.

Dr. Sylvie Peres recommends a varied diet, rich in seasonal vegetables and providing sufficient essential fatty acids. Small fatty fish such as sardines, mackerel, or herring are a source of omega-3.

Vegetable oils can also be varied, such as olive, rapeseed, flax, hemp, walnut, or camelina, to diversify fatty acid intake.

In parallel, a high consumption of foods with a high glycemic index can be associated with an aggravation of acne in some people. However, the impact of diet remains individual: systematic exclusions are not recommended without medical or nutritional advice.

Can food supplements help with acne?

A food supplement is not a treatment for acne and does not replace dermatological care when necessary. However, it can complement an adapted routine by providing micronutrients and active ingredients selected to support skin balance.

The Alaena Anti-Blemish Food Supplement is part of this complementary approach. Its formula notably contains zinc, a trace element that contributes to the maintenance of normal skin and the protection of cells against oxidative stress.

The combination of topical action and a nutritional approach thus makes it possible to act complementarily on the factors that contribute to the quality and balance of the skin.

What care should be performed after summer in case of rebound acne?

The decrease in sun exposure at the start of the school year allows for certain dermatological or aesthetic treatments to be considered, after skin assessment.

Dr. Sylvie Peres: "After summer, the objective is notably to reduce hyperkeratinization and gradually unclog follicles. Depending on the state of the skin, professional peels or deep skin cleansing may be indicated to act on comedones and microcysts."

In the presence of significant, inflammatory, persistent acne or acne leaving scars, a dermatological consultation is recommended to establish a diagnosis and adapted management.

Can you wear makeup when you have acne?

Yes, provided you choose textures adapted to your skin and do not neglect makeup removal by adopting double cleansing.

Light and non-occlusive textures are particularly suitable for combination to oily skin. The Tinted Mineral Sunscreen SPF50 unifies the complexion and visually reduces imperfections while offering broad-spectrum mineral protection against UVA and UVB. This photoprotection is particularly important for blemish-prone skin: it helps limit the accentuation of post-inflammatory pigmented marks caused by UV exposure.

Key takeaways

The impression of clearer skin in the sun can be misleading. UV rays do not treat acne and can, on the contrary, promote mechanisms that secondarily contribute to the appearance of blemishes.

After summer, the strategy is based on complementary actions: promote cell renewal without aggressing the skin, target imperfections, maintain adapted hydration, act from within, and daily protect the skin from UV rays. An approach that works with the skin's biological mechanisms rather than against them.