Acne, Psoriasis, Atopic Dermatitis: When the Skin Keeps Reacting

Acne keeps coming back, dermatitis flares up, psoriasis won't let go — despite treatment. Here's why skin conditions often have a deeper nature than it appears.

Woman examining her facial skin in a mirror — illustrating the cyclical course of skin conditions despite treatment — Apixmed Prism

You treat your skin, but symptoms keep coming back? Skin conditions often follow a wave-like course: periods of remission alternate with relapses. Acne, atopic dermatitis, and psoriasis may temporarily disappear with treatment, only to return weeks or months later.

This doesn't always reflect a treatment failure: in some dermatological conditions, controlling symptoms is not the same as eliminating causes.

When Different Skin Conditions Follow a Similar Pattern

Acne, psoriasis, and atopic dermatitis differ in their manifestations and mechanisms. But they share a common trait — inflammatory skin reactivity.

In acne, inflammation develops in the hair follicle against a backdrop of excess sebum production, impaired sebum drainage, and the involvement of the skin microbiome (notably Cutibacterium acnes).

In atopic dermatitis, the key driver is impaired skin barrier function and an exaggerated immune response — causing the skin to react even to ordinary external triggers.

In psoriasis, an immune-mediated inflammatory process is triggered, accelerating skin cell division and leading to the formation of characteristic plaques.

Different mechanisms — a shared outcome: heightened intensity and duration of the inflammatory response.

In some people, the skin reacts more strongly to the same triggers. This isn't only a matter of skincare, hygiene, or external factors such as stress — though those play a role too.

Current research shows that this variability is partly linked to individual biological characteristics that shape different thresholds of skin immune sensitivity to irritants.

Why Skincare Products Don't Always Deliver Consistent Results

Skincare products, dermatological treatments, and lifestyle changes do work. They reduce the signs of inflammation and help manage symptoms. But their action is mostly aimed at the current episode of inflammation.

If a tendency toward a certain type of immune response persists in the body, triggers can repeatedly activate the same mechanism — even after a period of remission.

This doesn't mean treatment is ineffective. It's necessary. But it operates within the realm of symptom control, not changing the underlying predisposition to react.

This is why the same approaches may produce different durations of effect in different people.

Comparison of three inflammatory skin conditions: acne (follicle), atopic dermatitis (barrier function), psoriasis (cell division) — Apixmed Prism

What May Influence More Than Skincare

One layer that influences the course of skin conditions is an individual biological predisposition to inflammatory reactions.

Genetic research (including GWAS studies) shows that atopic dermatitis and psoriasis have clear associations with gene variants involved in regulating immune response and skin barrier function.

In atopic dermatitis, the best-documented example is the inherited features of the FLG gene, which codes for the protein filaggrin. It forms the skin's protective layer, and when its function is impaired, the skin becomes more vulnerable to external irritants (Budu-Aggrey et al., Nature Communications, 2023). In psoriasis, a key role is attributed to variants of the HLA-C gene, which is related to how the immune system recognizes skin cells and triggers inflammation (Dand et al., Nature Communications, 2025).

Important: this is not about "one gene causing the disease," but about a combination of variants that may shift the threshold of immune sensitivity.

Simply put: different people's skin has different predispositions toward triggering and sustaining inflammation in response to the same stimuli. This is not a defect or a diagnosis in itself — it is biological variability.

When It Makes Sense to Look at the Problem More Broadly

There are situations where it's worth looking beyond external triggers to the underlying predisposition at the DNA level:

Adult acne that relapses after treatment; approximately 60% of adults with acne have a family history; first-degree relatives have >3-fold risk (Goulden et al., British Journal of Dermatology, 1999).
Atopic dermatitis that persists or returns after remission; FLG is the strongest genetic risk factor; loss-of-function mutations occur in 19.1% of patients vs 5.8% in the general population (Khatib et al., Experimental Dermatology, 2024).
Psoriasis with a wave-like course or family history; 60+ risk genes identified; if both parents are affected, risk is 50–70% (Strange et al., Nature Genetics, 2010).
Skin that consistently reacts to a broad range of triggers (stress, seasonal changes, new skincare products) without achieving lasting stability. Genetics affects skin barrier function; family history of sensitive skin increases risk (Lambrt et al., Immunological Disorders & Immunotherapy, 2023).

In these situations, the genetic context can help better understand the individual mechanism of skin reactivity — used alongside dermatological assessment.

Illustration of skin layers with the barrier layer highlighted — how disruption of the filaggrin layer increases sensitivity to irritants — Apixmed Prism

What Can Help to See the Genetic Context

A genetic test provides information about inherited predisposition to certain types of biological reactions, including inflammatory ones. It is not a diagnostic tool and does not determine treatment — but it adds another layer of understanding of individual skin characteristics.

The Apixmed Prism "Skin, Hair & Appearance" test includes assessment of genetic variants associated with the risk of conditions such as psoriasis, atopic dermatitis, and other skin inflammations.

In this context, skin is seen as a system where two levels interact: external triggers and an internal predisposition to inflammatory response. Daily skincare and treatment address the triggers, while the genetic context helps understand the variability of the body's response.

Find out what the genetic test reveals about skin's predisposition to inflammatory reactions → apixmed.com.ua/product/skin-hair-and-appearance

Genetic test results are not a diagnosis and do not replace a physician's consultation. The Apixmed Prism report provides genetic context that complements assessment results and supports informed decisions together with a doctor.

References

Budu-Aggrey A, et al. European and multi-ancestry genome-wide association meta-analysis of atopic dermatitis highlights importance of systemic immune regulation. Nature Communications. 2023;14:6172. https://doi.org/10.1038/s41467-023-41180-2
Chong AC, Visitsunthorn K, Ong PY. Genetic/Environmental Contributions and Immune Dysregulation in Children with Atopic Dermatitis. Journal of Asthma and Allergy. 2022;15:1681–1700. https://doi.org/10.2147/JAA.S293900
Dand N, et al. GWAS meta-analysis of psoriasis identifies new susceptibility alleles impacting disease mechanisms and therapeutic targets. Nature Communications. 2025;16:2051. https://doi.org/10.1038/s41467-025-56719-8
Goulden V, McGeown CH, Cunliffe WJ. The familial risk of adult acne: a comparison between first-degree relatives of affected and unaffected individuals. British Journal of Dermatology. 1999;141(2):297–300. https://doi.org/10.1046/j.1365-2133.1999.02979.x
Strange A, et al. Genome-wide association study of psoriasis identifies new susceptibility loci. Nature Genetics. 2010;42:985–990. https://doi.org/10.1038/ng.694
Lambrt B. The Impact of Genetics on Hypersensitive Skin. Immunological Disorders & Immunotherapy. 2023;8:154. https://doi.org/10.35248/2593-8509.23.8.154