SKIN ATLAS · SKIN CONDITION · 6 MIN. READING TIME

Acne: Causes, Types, and Effective Treatment at a Glance

Acne (Acne vulgaris) is one of the most common skin diseases worldwide – and far more than a temporary puberty problem. It occurs when excess sebum and dead skin cells clog hair follicles and promote inflammatory reactions.

What is Acne?

Acne is a disease of the sebaceous glands and hair follicles. When follicles become clogged by excess sebum and dead skin cells, comedones form – the basis of every acne breakout. Depending on bacterial colonization and degree of inflammation, these can develop into open or closed blackheads, papules, or purulent pustules. According to the Federal Ministry of Health, up to 85 percent of all adolescents between 12 and 24 years old are affected at some point, with about 15 to 30 percent experiencing moderate to severe forms.

Although acne is considered a puberty problem, it can occur at any age. So-called adult acne (Acne tarda) primarily affects women in adulthood and often runs a more persistent course than classic adolescent acne.

How does acne develop? Causes and Triggers

Acne is the result of several simultaneously acting factors. Androgens like testosterone stimulate the sebaceous glands to produce more sebum. Excess sebum combines with dead skin cells and clogs hair follicles. The bacterium Cutibacterium acnes, which naturally lives on the skin, can multiply strongly in these oxygen-poor environments and trigger inflammation, as explained by BARMER.

Further influencing factors:

• Genetic predisposition: Familial accumulation indicates a hereditary component.
• Stress: Cortisol and related stress hormones can increase sebum production and the skin's susceptibility to inflammation.
• Comedogenic skincare products: Overly rich formulations can further burden pores.

Acne Types and Severities at a Glance

Acne encompasses various clinical manifestations that differ in severity and appearance. Precise classification forms the basis of any targeted treatment:

• Acne comedonica: Mild form with open and closed comedones, without pronounced signs of inflammation.
• Acne papulopustulosa: Inflammatory papules and purulent pustules; most common form in clinical practice.
• Acne conglobata: Severe, deep inflammations with nodules and cysts, and an increased risk of scarring.
• Acne mechanica: Triggered by mechanical pressure or friction, such as from helmets or masks.
• Acne tarda: Adult acne, often hormonally induced and frequently more resistant to therapy.

Active Ingredients and Treatment for Acne

The appropriate therapy depends on the severity, skin type, and individual triggers. Mild forms can often be stabilized with a targeted skincare routine; moderate to severe cases usually require dermatological guidance.

Proven external active ingredients:

• Benzoyl peroxide: Has antibacterial effects against Cutibacterium acnes and supports pore cleansing.
• Salicylic acid: Dissolves sebum accumulations in the pores and contributes to comedolysis – particularly effective for non-inflammatory forms.
• Retinoids: Regulate cell renewal and can reduce the risk of scarring.
• Niacinamide: Strengthens the skin barrier, can reduce redness, and combines well with other acne active ingredients.
• Azelaic acid: Antimicrobial and anti-inflammatory, well-tolerated even by sensitive skin.
• Zinc: Contributes to balanced sebum regulation and can inhibit inflammatory processes.

For moderate to severe acne, medically supervised systemic therapy may be necessary – for example, with antibiotics, oral isotretinoin, or hormonal therapy options for women.

Application and Skincare Routine for Acne

Certain lifestyle and dietary habits can noticeably influence the skin's appearance – the correlation varies individually:

• Foods with a high glycemic index are suspected of stimulating sebum production.
• Omega-3 fatty acids from oily fish, flaxseed, or walnuts can positively influence inflammatory processes.
• Gentle cleansing twice daily protects the skin barrier without additional irritation.
• Inflamed pimples should not be squeezed, as this promotes scarring and the spread of germs.
• Sufficient sleep and targeted relaxation can reduce cortisol levels and positively influence the skin's appearance.

Frequently Asked Questions about Acne

Which active ingredients are most effective against acne?

Scientifically well-documented active ingredients include salicylic acid, benzoyl peroxide, azelaic acid, niacinamide, and zinc. Which is most suitable depends on the severity and individual skin type. For moderate to severe acne, dermatological consultation is recommended.

Can adult acne be hormonally induced?

Yes. Adult acne is often hormonally triggered – by cycle fluctuations, changes in contraception, or polycystic ovary syndrome. In these cases, dermatological or gynecological clarification may be advisable.

How long does it take for acne treatment to work?

Most topical active ingredients show initial improvements after 4 to 8 weeks. Sustainable improvement usually requires consistent application over several months.

Conclusion

Acne is a complex but well-researched skin condition. With the right understanding of its causes, a consistent skincare routine, and – where necessary – medical guidance, the skin's appearance in acne can be sustainably improved. Active ingredients such as salicylic acid, niacinamide, azelaic acid, and zinc show visible results with regular use; a low-irritant basic skincare forms the crucial foundation.

References

1. Acne on gesund.bund.de – Federal Ministry of Health
2. Understanding and treating acne on barmer.de – BARMER Health Insurance