Acne is one of the most common skin conditions, caused by clogged pores, excessive sebum production and keratinization, as well as the growth of certain bacteria. Acne appears in the form of blackheads, pimples, pustules, and nodules, primarily affecting the face but can also occur on the back and chest. Acne is not contagious and is especially common during puberty. Around 70 to 95 percent of adolescents experience acne-related inflammatory skin changes. Acne can also have psychological effects, as it can impact self-confidence and body image.
Types of Acne and Their Symptoms
“Acne vulgaris” is the medical term for the most common form of acne, known as simple acne. Acne is a more general term used for any form of skin condition characterized by inflammation, pimples, and blackheads. Depending on the type and severity of acne, different forms are distinguished:
- Acne comedonica: This is a mild form of acne mainly caused by clogged pores leading to black and whiteheads. These are especially found on the nose, chin, and forehead.
- Acne papulo-pustulosa: inflammatory (pus-filled) pustules, tender papules, and small nodules. Also affects the chest, back, and upper arms, with possible scarring.
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Acne conglobata: This is a rare and severe form of acne characterized by large, deep nodules, abscesses, and channels filled with pus. This form mainly affects men.
Differences Between Men and Women
Although acne can occur in both genders, there are some differences regarding the type and severity of symptoms as well as the contributing factors. Hormonal changes can play a role in the development of acne in women, especially during puberty, menstruation, pregnancy, and menopause. Men, on the other hand, more often have a hereditary predisposition leading to acne. Women often have a milder form of acne mainly affecting the face, neck, and back, while men tend to suffer from more severe forms that can also spread to the chest and upper body. Stress, unhealthy diet, and unsuitable skincare products can contribute to acne in both genders. In women, hormonal changes caused by certain medications or birth control pills can also play a role. In acne treatment, women often benefit from hormonal therapy, while men more frequently require antibiotics or other topical or systemic therapies.
Causes of Acne
The main causes of acne are:
- Hormonal changes: Changes in hormone levels, such as during puberty or menstruation in women, can lead to increased sebum production, which contributes to clogged pores and acne development.
- Excessive sebum production: Excess sebum can clog pores and promote bacterial growth.
- Bacterial infection: Propionibacterium acnes (P. acnes) is a bacterium found in pores that can trigger acne when sebum production is excessive.
- Keratinization disorders: A disruption in the natural keratinization process of the skin can contribute to clogged pores and acne development.
- Genetic factors: Acne can be inherited, indicating that genetic factors may play a role in the disease’s development.
- Environmental factors: Some environmental factors, such as stress, poor diet, alcohol consumption, and certain cosmetics, can worsen acne.
Diagnosis and Treatment of Acne
Acne is usually diagnosed through a thorough physical examination by a dermatologist. So far, no permanent cure for acne has been found. However, the right treatment can shorten the course of the disease, reduce its severity, and prevent scar formation. There are many treatment options for acne, including proper facial cleansing and care, topical medications such as benzoyl peroxide and retinoids, oral antibiotics, and hormonal therapies. The choice of treatment depends on the severity of acne and the patient’s age. It is best to consult a dermatologist to determine the best treatment method for the individual situation.
Skin Flora: Acne Alters the Skin Microbiome
In addition to the causes mentioned above, it has also been found that a disturbed skin microbiome can have a significant impact on the occurrence of acne. The skin microbiome refers to the diversity and balance of microorganisms living on the skin. Healthy skin has a balanced skin flora that protects against infections and inflammation. However, when the microbiome is disturbed, there can be an overgrowth of pathogenic bacteria such as Propionibacterium acnes, which can lead to inflammation of the sebaceous glands and acne formation. A disturbed skin microbiome can arise for various reasons, including excessive cleansing, antibiotic use, stress, and an unhealthy diet. To maintain a balanced skin microbiome and prevent acne, it is important to lead a healthy lifestyle, including a balanced diet, regular physical activity, and sufficient sleep. It is also important to be mindful of using harsh cleansing and beauty products and, if necessary, switch to milder alternatives. Here, too, a visit to a dermatologist can be beneficial.
The Gut as a Cause of Acne?
In addition to the influence of the skin microbiome, studies have shown that acne is also linked to the gut. The gut plays an important role in regulating the immune system and controlling inflammation in the body. If there is a dysfunction in the gut, it can lead to systemic inflammation and immune system malfunction, which in turn can worsen acne. It is suspected that certain bacteria in the microbiome play a role in regulating inflammation and other processes relevant to skin health. Furthermore, a disturbed gut flora can also affect the hormonal system, which can also contribute to the development of acne.
How Diet Can Influence Acne
An unhealthy diet rich in refined carbohydrates, sugar, and processed foods can lead to dysbiosis (microbiome imbalance) in the gut and thus affect the occurrence of acne. A balanced diet rich in fiber, fresh fruits, and vegetables can improve the gut microbiome and help reduce acne.
Scientists have found in studies that acne patients almost exclusively have an imbalanced microbiome. New approaches to treating acne increasingly include probiotics and prebiotics, as it has been shown that these benefit the gut flora and can restore its balance.
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