Global Dermatology - Christophe HSU MD: Dermatologist; Dermatologue

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Global Dermatology - Christophe HSU MD: Dermatologist; Dermatologue

The Global Dermatology Practice offers clinical services and aims to complement the Global Dermatology Information Portal. Consultations in English.

Located in downtown Geneva behind the Mandarin Oriental Hotel, this dermatology centre is mainly designed to offer medical dermatology services to:
-the non-French speaking expatriate community in Geneva.
-those visiting Geneva. Access:
-By foot: a few minutes walk from Bel-Air (Cité).
-By car-parking: The best option is to park in the parking of the Mandarin Oriental Hotel and to walk up a flight of stairs (one floor).
-By public transport: Stops Isaac Mercier (lines 7, 11 and 15) and Simon-Goulart (lines 11, 15 and 18). PS: We do not give medical advice to non-patients.

05/04/2026

Melasma – Understanding Facial Pigmentation [Link under comments]
-Melasma is a common skin condition that causes brown or greyish patches, usually on the face. It often affects women of childbearing age and is sometimes called the “pregnancy mask.” Hormonal factors, including pregnancy and oral contraceptives, play an important role in its development.
-Melasma typically appears on the cheeks, forehead, nose, and upper lip, and is often triggered or worsened by sun exposure.
-Although harmless, melasma can be persistent and prone to recurrence, especially without proper sun protection. Treatment usually starts with topical creams and strict sun protection, while procedures such as chemical peels or lasers may be considered in some cases.
-Consistent care and sun avoidance are key to managing this condition effectively. ☀️🩺

29/03/2026

Chickenpox – What You Should Know [Link under comments]
-Chickenpox is a common and highly contagious infection caused by the Varicella Zoster Virus, most often affecting children.
-It usually starts with a rash that develops into itchy blisters, which then dry and form scabs. A key feature is that spots appear in different stages at the same time. The rash is often very itchy, and scratching can lead to infection or scarring.
-Chickenpox spreads easily from person to person and remains contagious until all the spots have crusted over, so isolation is important.
-Most cases are mild and treated with symptom relief, but medical care may be needed in more severe cases or in high-risk individuals.
-The condition is preventable with vaccination, which is part of routine childhood immunization in many countries.
-The virus can stay in the body and reactivate later in life as shingles, also known as Herpes Zoster.
-If you or your child develop symptoms, especially during pregnancy or adulthood, it’s important to seek medical advice. 🩺

23/03/2026

Skin Cancer – What You Should Know [Link under comments]
-Skin cancer is increasingly common, especially in countries like Switzerland where people enjoy outdoor activities such as hiking and skiing. Higher altitudes mean greater exposure to ultraviolet (UV) rays, which can increase the risk over time.

-The three most common types of skin cancer are:
• Basal Cell Carcinoma – slow-growing and linked to long-term sun exposure
• Squamous Cell Carcinoma – also related to cumulative sun exposure and may develop from Actinic Keratosis
• Malignant Melanoma – less common but more serious, often linked to intense, intermittent sun exposure

-With increasing age and sun exposure, the risk of skin cancer rises. Regular skin checks can help detect changes early.
-Most skin cancers and precancerous lesions can be treated effectively, especially when found early. Treatments may include freezing (cryotherapy) or minor surgical removal.
-Protecting your skin from the sun remains one of the most important steps in prevention. ☀️🩺

16/03/2026

Skin Signs of Internal Cancers (1 of 2)
-Sometimes the skin can give clues about diseases inside the body. Certain skin changes may act as early warning signs of internal cancers, helping doctors detect problems earlier.

-These skin signs generally fall into two groups:
• Skin conditions linked to internal cancers, such as Acanthosis Nigricans or Dermatomyositis.
• Skin metastases, where cancers from organs such as the breast, lung, or colon spread to the skin and appear as firm nodules.

-Most skin changes are harmless, but new, unusual, or persistent skin lesions should always be evaluated by a doctor. -Early recognition can help with timely diagnosis and treatment. 🩺 [Link under comments]

09/03/2026

Basal Cell Carcinoma – What You Should Know [Link under comments]
-Basal Cell Carcinoma is the most common type of skin cancer. It develops from cells in the outer layer of the skin and is mainly caused by long-term exposure to ultraviolet (UV) radiation from the sun. It most often appears on sun-exposed areas such as the face, ears, neck, scalp, and hands.
-Basal cell carcinoma usually grows slowly and rarely spreads to other parts of the body. However, if left untreated, it can continue to grow and damage nearby skin and tissues. It may appear as a shiny or pearly bump, a pink patch, a sore that does not heal, or a growth that bleeds easily.
-Early detection and treatment are very important and are usually highly effective. Protecting your skin from excessive sun exposure and seeking medical advice for any new, changing, or non-healing skin lesions can help ensure early diagnosis and proper care. ☀️🩺

03/03/2026

Introduction to Atopic Dermatitis (post 3 of 3) – Common Questions [Link under comments]
-In this third post on atopic dermatitis, we focus on some of the most common questions patients and parents ask about treatment, environment, and possible complications.
-Managing atopic dermatitis is not just about using creams during a flare-up. It involves understanding triggers, following proper skincare routines, using medications correctly, and knowing when to seek medical attention. Many people also wonder whether changing climate or environment can help, and whether there are risks of infections or other complications.
-In this post, we will address these important concerns and provide practical, easy-to-follow guidance to help improve symptom control and overall skin health.

23/02/2026

Introduction to Atopic Dermatitis (2 of 3) [Link under comments]
-Atopic dermatitis is the most common type of eczema. It is a long-term skin condition that causes dry, itchy, and inflamed skin. It often begins in childhood but can affect people of any age. The condition may come and go over time, with periods of flare-ups and periods when the skin is calmer.
-Atopic dermatitis occurs when the skin’s natural protective barrier is weaker than normal. This allows moisture to escape and makes the skin more sensitive to irritants, allergens, and environmental factors. As a result, the skin becomes dry, easily irritated, and itchy. Scratching can worsen the irritation and sometimes lead to skin infections.
-People with atopic dermatitis often have a personal or family history of allergies, asthma, or hay fever. The condition is not contagious and cannot be passed from person to person. While there is no cure, proper skincare and treatment can help control symptoms and improve comfort and quality of life.
-More on Atopic Dermatitis in the next post.

18/02/2026

Introduction to Atopic Dermatitis [Link under comments]
-Atopic dermatitis is the most common type of eczema. It is a long-term skin condition that causes dry, itchy, and inflamed skin. It often begins in childhood but can affect people of any age. The condition may come and go over time, with periods of flare-ups and periods when the skin is calmer.
-Atopic dermatitis occurs when the skin’s natural protective barrier is weaker than normal. This allows moisture to escape and makes the skin more sensitive to irritants, allergens, and environmental factors. As a result, the skin becomes dry, easily irritated, and itchy. Scratching can worsen the irritation and sometimes lead to skin infections.
-People with atopic dermatitis often have a personal or family history of allergies, asthma, or hay fever. The condition is not contagious and cannot be passed from person to person. While there is no cure, proper skincare and treatment can help control symptoms and improve comfort and quality of life.
-More on Atopic Dermatitis in the next two posts.

10/02/2026

Introduction to Eczema (Dermatitis) [Link under comments]
-Eczema, also known as dermatitis, is a common condition that causes the skin to become dry, itchy, red, and inflamed. -It can affect people of all ages, from infants to older adults, and may come and go over time. Eczema is not contagious, but it can be uncomfortable and sometimes interfere with daily activities and sleep.
-The condition occurs when the skin’s protective barrier does not work as well as it should. This allows moisture to escape and irritants, allergens, and germs to enter the skin more easily. As a result, the skin becomes sensitive and prone to inflammation. Triggers such as soaps, detergents, weather changes, stress, or certain fabrics can make symptoms worse.
-There are several different types of eczema, each with its own causes and features. Some are linked to allergies or asthma, while others are related to skin irritation or environmental factors. Although eczema is a long-term condition for many people, symptoms can usually be well controlled with proper skincare, avoidance of triggers, and medical treatment when needed.
-In the next posts, we will focus on Atopic Dermatitis, the most common form of eczema, including what causes it, how it affects different age groups, and how it can be managed effectively.

05/02/2026

Introduction to Alopecia Areata [Link under comments]
-Alopecia areata is a condition that causes sudden hair loss, usually in small, round patches on the scalp or other parts of the body. It occurs when the body’s immune system mistakenly attacks the hair follicles, which slows or stops hair growth. The skin in the affected areas typically looks normal and healthy.
-Alopecia areata can affect people of any age, including children, and it may develop suddenly without warning. The amount of hair loss varies from person to person. Some people lose only a few small patches of hair, while others may experience more widespread hair loss. In many cases, hair regrows on its own over time, although it may fall out again in the future.
-The condition is not contagious and is not caused by poor health or hair care practices. While alopecia areata does not usually cause physical discomfort, it can be emotionally distressing and may affect self-confidence and well-being.
-There is currently no cure, but treatments are available that may help stimulate hair regrowth or reduce further hair loss. A healthcare professional can help assess the condition, discuss treatment options, and provide support and reassurance.

28/01/2026

Introduction to Actinic Keratosis [Link under comments]
-Actinic keratosis is a common skin condition caused by long-term exposure to sunlight. It appears as rough, dry, or scaly patches on the skin that may be skin-coloured, red, or brown. These areas can feel gritty or sandpaper-like and are often easier to feel than to see. Actinic keratoses usually develop on sun-exposed areas such as the face, ears, scalp, neck, forearms, and hands.
-This condition is most often seen in older adults and in people who have spent many years outdoors, but it can also occur in younger individuals with significant sun exposure. People with fair skin, light hair, or a history of sunburns are at higher risk.
-Actinic keratosis is considered a precancerous skin change. While many patches remain harmless, a small number can develop into a type of skin cancer called squamous cell carcinoma if left untreated. For this reason, early detection and treatment are important.
-Treatment options are usually straightforward and may include freezing the spot, applying prescription creams, or other minor procedures. Protecting the skin from further sun damage—by using sunscreen, wearing protective clothing, and avoiding excessive sun exposure—can help prevent new lesions and reduce the risk of progression.

21/01/2026

Introduction to Age Spots [Link under comments]
-Age spots, also known as liver spots or sun spots, are flat, brown, grey, or black marks that appear on the skin as we get older. They are very common and usually develop on areas of the body that are most exposed to the sun, such as the face, hands, shoulders, arms, and upper chest.
-These spots are caused by years of sun exposure, which leads to an increase in pigment (melanin) in certain areas of the skin. Although they are more common in adults over the age of 40, age spots can appear earlier in people who spend a lot of time in the sun or use tanning beds. People with lighter skin tones tend to develop age spots more easily, but they can occur in all skin types.
-Age spots are harmless and do not require medical treatment. However, some people choose to have them checked or treated for cosmetic reasons or because they are concerned about changes in their skin. It is important to have any new, changing, or unusual spots examined by a healthcare professional to rule out more serious skin conditions.
-Protecting the skin from sun exposure by using sunscreen, wearing protective clothing, and avoiding peak sun hours can help prevent new age spots from forming and stop existing ones from becoming darker.

Adresse

Boulevard James Fazy 4
Geneva
1201

Webseite

http://genevadermatology.ch/

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