Why do some acne spots leave scars ?
A scar may appear when an acne lesion causes inflammation deep enough to damage the dermis.
During healing, the skin must rebuild damaged tissue. If repair does not properly restore skin volume, a depressed scar may appear. Conversely, excessive scar tissue production may cause a raised scar.
Nodules and cysts carry greater scarring risk because inflammation reaches deep skin layers. However, less severe acne can also leave scars, particularly when spots are regularly manipulated.
Why does prompt acne treatment reduce scarring risk ?
Early acne treatment reduces scarring risk by limiting inflammatory lesions likely to damage the dermis.
Untreated acne may cause new flare-ups. Each deep lesion, particularly a nodule or cyst, may damage the dermis and leave a scar.
The American Academy of Dermatology therefore recommends early acne management to reduce scarring risk. Treatment is selected according to lesion type and acne severity.
Scar prevention thus begins during active acne, before lesions leave permanent scars.
Should mild acne be treated to prevent scars ?
Yes. Even mild acne should be treated when persistent, increasingly inflammatory or beginning to leave marks, as it too can cause scars.
Scarring risk is greater in severe acne but not limited to it. Initially mild acne may evolve and gradually involve more inflammatory lesions.
Appropriate treatment controls flare-ups and reduces new lesions likely to leave scars.
Does popping spots increase scarring risk ?
Yes. Squeezing, popping or scratching acne lesions increases trauma and may promote scarring.
Mechanical manipulation may worsen inflammation and further damage tissues around the follicle.
The risk is particularly high when attempting to extract a deep lesion that cannot drain easily.
Treating the spot rather than attempting manual emptying is therefore preferable. The American Academy of Dermatology explicitly identifies squeezing or scratching lesions as increasing scarring risk.
Can a cream prevent a spot from leaving a scar ?
No cream applied occasionally to a spot guarantees absence of a scar.
The aim is above all to treat acne comprehensively to reduce existing inflammatory lesions and prevent new ones.
Nevertheless, evidence shows effective acne control can reduce new scar formation. In a randomised trial on moderate inflammatory acne, adapalene 0,1 %–benzoyl peroxide 2,5 % limited new atrophic scars over six months compared with a formulation without these active ingredients.
However, this combination does not suit every acne type. Treatment must be chosen according to lesion type and acne severity.
Does the sun cause acne scars ?
No. The sun does not directly cause acne scars. However, it may worsen acne consequences by promoting new flare-ups and darkening marks left by spots.
After sun exposure, spots may seem less visible temporarily. This improvement is temporary. In some people, acne returns or worsens in subsequent weeks. New inflammatory spots may then leave scars in turn.
The sun can also darken brown marks persisting after spots disappear. These represent post-inflammatory hyperpigmentation : they are not scars but may become more visible and persist longer after UV exposure.
Sun protection therefore mainly prevents acne marks from darkening. To prevent true scars, controlling inflammatory acne and limiting new lesions remain the priority.
Can scars be prevented if some are already appearing ?
Yes. Even when initial acne scars are already present, new scars can still be prevented by promptly treating active acne.
The priority is controlling inflammatory lesions that continue appearing. While acne remains active, every new inflammatory lesion may leave a new mark or scar.
The American Academy of Dermatology generally recommends controlling acne flare-ups before scar treatment.
Care therefore has two distinct objectives : preventing new scars through active acne control, then treating existing scars.
Are some people at greater risk of acne scars ?
Yes. The risk differs among people with acne.
Deep, inflammatory acne lesions are more likely to scar. A family history of acne scars is also an identified risk factor.
Repeated spot manipulation also increases scarring risk.
Conversely, evolution cannot be perfectly predicted : some substantial acne leaves relatively few scars, while less severe forms may cause them.
Can all acne scars be prevented ?
No. Preventing every acne scar is impossible, but early, regular care reduces risk.
Scar formation depends particularly on inflammation depth and how skin heals, varying between individuals. A scar may therefore appear despite appropriate care.
Three measures reduce the main modifiable factors : treating acne early, controlling flare-ups over time and avoiding popping or manipulating spots.
Once scars have formed, the objective changes : improving rather than preventing them. After active acne control, certain scars can particularly be treated with fractional lasers to stimulate skin remodelling.
Active acne, whose treatment particularly prevents new scars, must therefore be distinguished from established scars requiring specific care.
Article written by Dr Valeria Romano
Dr Valeria Romano supports each patient with a comprehensive approach to the aesthetics of the face, body and intimate areas, and to skin and hair quality. Every treatment is based on a personalised medical assessment.
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