Eczema, also known as atopic dermatitis, is a chronic skin condition that causes inflammation, redness, itching, and dryness. It often occurs in cycles, with periods of flare-ups followed by times when symptoms improve or disappear.

Different Types of Eczema

1. Atopic Dermatitis

Atopic dermatitis is the most common form of eczema and often begins in childhood. It is linked to an overactive immune system and is commonly associated with allergies, hay fever, and asthma. Symptoms include dry, itchy, and inflamed skin, often appearing on the face, neck, hands, and in the creases of elbows and knees.

2. Contact Dermatitis

This type occurs when the skin comes into contact with irritants or allergens. There are two subtypes:

• Irritant Contact Dermatitis: Triggered by substances like soaps, detergents, or chemicals.
• Allergic Contact Dermatitis: Caused by allergens such as nickel, fragrances, or certain plants. Symptoms include redness, itching, and sometimes blisters or cracked skin.

3. Dyshidrotic Eczema

This type primarily affects the hands and feet, causing small, itchy blisters. It is more common in women than men and may be triggered by stress, allergies, or exposure to moisture.

4. Nummular

Nummular eczema is characterised by round, coin-shaped patches of irritated skin. These patches are often itchy, scaly, and sometimes ooze or become crusted. It can be triggered by dry skin, injuries, or insect bites.

5. Seborrheic Dermatitis

This type affects areas of the body with a high concentration of oil glands, such as the scalp, face, and upper chest. It appears as red, scaly, and greasy patches, often accompanied by dandruff. It may worsen in cold, dry weather.

6. Stasis Dermatitis

Stasis dermatitis occurs when poor blood circulation, often in the lower legs, leads to fluid buildup and inflammation. Symptoms include swollen legs, discolouration, and itchy, scaly skin. It is common in people with varicose veins or other circulatory issues.

7. Neurodermatitis

This type is triggered by repeated scratching of a specific area, leading to thick, leathery patches of skin. It is often linked to stress, anxiety, or other skin conditions and commonly affects the neck, wrists, forearms, and legs.

Each type of eczema has unique triggers and treatments, so proper diagnosis by a healthcare provider is important for effective management.

What Causes Eczema?

Eczema is believed to result from a combination of genetic and environmental factors. A genetic predisposition plays a significant role, as people with a family history of eczema, asthma, or hay fever are more likely to develop the condition.

The skin barrier, which helps retain moisture and protect against irritants, may also be weaker in individuals with eczema, making them more prone to dryness and irritation. Environmental triggers such as allergens (pollen, pet dander, dust mites), irritants (harsh soaps, chemicals), extreme temperatures, stress, and infections can also initiate or worsen flare-ups.

The immune system’s overreaction to these triggers is thought to contribute to the inflammation and itching characteristic of eczema.

How Common is Eczema?

Eczema is a common condition, affecting approximately 10-20% of children and 1-3% of adults worldwide. It is more prevalent in developed countries, where rates have been steadily increasing over the years.

While many children outgrow eczema by adolescence, some continue to experience symptoms into adulthood. The condition can occur in individuals of all ages, ethnicities, and genders, although certain forms, such as atopic dermatitis, are particularly common in children.

What are the Symptoms?

The symptoms of eczema can vary depending on the type and severity of the condition, but common symptoms include:

1. Itching

Itching is often the most prominent and distressing symptom of eczema. It can range from mild to intense and may worsen at night.

2. Redness and Inflammation

Affected areas of the skin may become red, inflamed, and swollen. This is a result of the immune system reacting to triggers.

3. Dry, Scaly Skin

The skin may become dry, flaky, or rough. In some cases, the skin can crack, leading to further irritation.

4. Rashes and Lesions

Eczema can cause rashes that may appear as red or brownish patches, often with raised bumps or blisters. The affected skin can become crusted or ooze, particularly in severe cases.

5. Thickened Skin

Over time, areas of the skin affected by eczema may become thickened (a process called lichenification), especially if the condition is scratched repeatedly.

6. Crusting and Oozing

In more severe flare-ups, eczema can cause blisters or open sores that leak fluid and form crusts.

7. Pigmentation Changes

Once eczema lesions heal, they may leave behind darker or lighter skin patches, which can be more noticeable in darker-skinned individuals.

The severity and location of these symptoms can vary, and some people may experience them only during flare-ups, while others may deal with persistent symptoms.

Where Symptoms Appear on the Body?

Eczema can appear on various parts of the body, depending on the type and severity of the condition. Common areas where eczema symptoms appear include:

Face

In infants and young children, eczema often appears on the face, particularly around the cheeks, chin, and forehead. Adults may also experience eczema on their face, especially around the eyes and eyelids.

Hands and Feet

It frequently affects the hands and feet, with dryness, cracking, and blisters commonly appearing on the palms, fingers, and soles. In dyshidrotic eczema, small blisters form on the palms and fingers.

Elbows and Knees

The creases of the elbows and knees are common areas for atopic dermatitis. The skin here is often dry, thickened, and may crack or develop a rash.

Neck and Chest

The neck, chest, and upper body can also be affected, especially in cases of seborrheic dermatitis or atopic dermatitis. The chest may experience dry, itchy patches, and the neck may have red or scaly areas.

Scalp

Eczema can affect the scalp, leading to dryness, flaking, and dandruff-like symptoms. This is common in seborrheic dermatitis.

Arms and Legs

In adults, eczema may appear on the upper arms, forearms, or lower legs. Nummular eczema can cause round, coin-shaped patches to form on the limbs.

Back of the Knees and Inside the Elbows

These areas are common for eczema in both children and adults, particularly for those with atopic dermatitis.

While eczema can appear anywhere on the body, the locations listed above are the most frequently affected, especially during flare-ups.

What Causes Eczema?

1. Genetic Factors

Eczema is strongly influenced by genetic predisposition. People with a family history of eczema, asthma, or hay fever are more likely to develop the condition. Specific gene mutations, such as those affecting the skin’s barrier protein (filaggrin), can weaken the skin’s ability to retain moisture and protect against irritants, making it more susceptible to eczema.

2. Immune System Dysfunction

In individuals with eczema, the immune system overreacts to environmental triggers, causing inflammation and irritation in the skin. This immune response is responsible for the characteristic symptoms of eczema, such as redness, itching, and swelling. The immune system’s reaction to triggers is heightened, making the skin more reactive and prone to flare-ups.

3. Environmental Triggers

Environmental factors play a significant role in triggering eczema flare-ups. These can include:

• Allergens: Pollen, pet dander, dust mites, mold, and certain foods (e.g., dairy, eggs) can trigger eczema symptoms.
• Irritants: Harsh soaps, detergents, chemicals, fragrances, and rough fabrics (e.g., wool) can irritate the skin, leading to outbreaks.
• Weather Conditions: Cold, dry air or excessive heat and sweating can cause the skin to become dry and irritated, exacerbating eczema.
• Infections: Bacterial or viral infections, including staph infections, can worsen eczema and lead to new flare-ups.

4. Skin Barrier Defects

The skin barrier, which is responsible for keeping moisture in and harmful substances out, may be impaired in individuals with eczema. This makes the skin more prone to dryness, irritation, and the entry of allergens or irritants, which can trigger an inflammatory response.

5. Stress

Stress is a known trigger for eczema flare-ups. Emotional or physical stress can trigger the release of certain hormones that increase inflammation in the body, leading to worsening of eczema symptoms. Additionally, scratching due to itching may also increase stress and perpetuate the cycle.

6. Hormonal Changes

For some people, hormonal changes, such as those experienced during pregnancy, menstruation, or puberty, can exacerbate eczema. Hormonal fluctuations may influence the skin’s sensitivity and immune system response, leading to flare-ups.

7. Climate and Air Pollution

Exposure to air pollutants, including cigarette smoke and car exhaust, as well as extreme weather conditions, such as high humidity or freezing temperatures, can irritate the skin and lead to eczema outbreaks. Environmental pollution may trigger allergic responses and worsen skin conditions.

Eczema’s onset is typically the result of a combination of these factors, and triggers can vary significantly from one individual to another.

How is Eczema Diagnosed?

It is typically diagnosed through a physical examination and a review of your medical history. Here’s how the process generally works:

1. Medical History

The doctor will ask about your symptoms, family history of eczema or other allergic conditions (such as asthma or hay fever), and any potential triggers you’ve noticed. They may also inquire about your lifestyle, environmental factors, and previous treatments you’ve tried.

2. Physical Examination

A healthcare provider will examine your skin for signs of eczema, such as redness, inflammation, dry patches, or lesions. The location and appearance of the rash can help determine the type of eczema you may have. They will also look for patterns in your skin that are typical of different forms of eczema (e.g., atopic dermatitis, contact dermatitis).

3. Patch Testing

If the doctor suspects contact dermatitis, they may recommend patch testing to identify specific allergens that could be triggering your symptoms. This involves placing small amounts of potential allergens on your skin and monitoring for reactions over a few days.

4. Skin Biopsy

In rare cases, a skin biopsy may be performed if the diagnosis is unclear or if there is concern about another skin condition. A small sample of skin is taken and examined under a microscope to confirm the presence of eczema and rule out other conditions.

5. Blood Tests

While blood tests are not typically used to diagnose eczema, they may be ordered if there is a concern about infections or to check for underlying conditions like allergies or immune system disorders.

In most cases, the combination of medical history, physical examination, and sometimes patch testing is sufficient to diagnose eczema.

How do I get Rid of Eczema?

While there is no cure for eczema, it can be effectively managed with proper treatment and lifestyle changes. Here are some common strategies to help reduce symptoms and control flare-ups:

Moisturise Regularly

Keeping the skin well-hydrated is crucial for managing eczema. Use fragrance-free, thick moisturisers (such as creams or ointments) immediately after bathing to lock in moisture and prevent dryness. Apply moisturiser several times a day, especially to areas that are prone to eczema.

Topical Steroids and Prescription Medications

Topical corticosteroids (steroid creams or ointments) are commonly prescribed to reduce inflammation and itching during flare-ups. For severe cases, stronger prescription treatments like calcineurin inhibitors or topical immunomodulators can be used to calm the immune response. Oral antihistamines may be recommended to relieve itching, especially at night.

Avoid Triggers

Identify and avoid potential triggers that worsen eczema symptoms, such as allergens, irritants, and certain fabrics. Common irritants include harsh soaps, perfumes, or wool, while common allergens include pollen, pet dander, and dust mites. Also, try to minimise stress as it can trigger flare-ups.

Gentle Skincare Routine

Use mild, fragrance-free soaps and cleansers to avoid irritating the skin. Avoid hot water when bathing, as it can dry out the skin; instead, opt for lukewarm water and limit bathing time. Pat your skin dry with a soft towel instead of rubbing it, and apply moisturiser immediately afterward.

Wet Wrap Therapy

For severe flare-ups, wet wrap therapy can be helpful. This involves applying a moisturising ointment or topical treatment to the affected areas, then covering the skin with a damp cloth or gauze, followed by a dry layer of clothing. This helps the skin absorb the moisture and soothe irritation.

Medications for Severe Cases

If eczema is severe or doesn’t respond to topical treatments, oral medications like corticosteroids, immunosuppressants, or biologic drugs may be prescribed to manage inflammation and control flare-ups. These medications are typically used for short periods due to potential side effects.

Phototherapy

In some cases, light therapy (phototherapy) can be used to treat eczema. It involves exposing the skin to controlled ultraviolet (UV) light under medical supervision to reduce inflammation and improve skin condition.

Lifestyle Adjustments

Make adjustments in your lifestyle to support overall skin health. This may include managing stress through relaxation techniques, wearing soft, breathable fabrics (like cotton), and avoiding extreme weather conditions that can dry out your skin.

Allergy Treatment

If allergies are contributing to your eczema, working with an allergist to manage or eliminate triggers through medications, lifestyle changes, or allergy shots may help prevent flare-ups.

Eczema management is highly individualised, and it may take time to find the right combination of treatments that work for you. Consulting a dermatologist is important to create a tailored treatment plan.