Eczema: Causes and Solutions for Severe Itching - Dermatology

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During the treatment of eczema, there may be a sensation of generalized skin itching?


Three days ago, I unexpectedly discovered large red swollen patches on my left cheek and forehead.
At that time, I didn't feel any itching, so I didn't pay much attention to it.
A few hours later, similar red swollen patches began to appear on my left arm, and I started to feel itching in my hand.
Later, both of my legs also developed dense red rashes that were extremely itchy.
Strangely, the rashes on my face hardly itched, while my hands and feet continued to itch more and more severely.
After visiting a doctor, I was diagnosed with "eczema" and prescribed oral and topical medications.
I took the medications and applied the topical treatment as directed, and I avoided foods that the doctor advised against.
Two days later, the condition on my face improved significantly, but my hands and feet remained in bad shape.
In fact, I began to experience "generalized pruritus" (not continuous itching, but intermittent bouts of itching), which felt like the itch was coming from deep within my skin, affecting not just the areas with rashes but my entire body, even causing twitching reactions.
It was really uncomfortable, and I couldn't sleep well at night.
I changed my bedsheets and adjusted the water temperature for bathing to lukewarm, but there was no improvement.
1.
I have never had issues with eczema before; why did I suddenly develop it, and why is the condition so acute and painful?
2.
What is the cause of the intermittent generalized itching that started after seeing the doctor? (I didn't experience this before seeing the doctor.)
3.
Some people say it might be an allergy to pet hair, but I have had this pet (a short-haired dog) for almost two years without any issues; why would it suddenly occur now?
4.
How long is it expected to take for me to recover?
5.
The itching is affecting my daily routine; what methods can quickly alleviate the itching? (Is there any injection that can help?)
Please provide me with some reference answers, thank you.

Ms. Hsu, 20~29 year old female. Ask Date: 2015/09/17

Dr. Li Yufen reply Dermatology


Hello: The causes of eczema are very diverse, and just because you haven't experienced it before doesn't mean you won't in the future, especially as you age, your skin's tolerance may decrease.
Based on the situation you described, the widespread itching has severely affected your daily routine.
It is advisable to seek a dermatologist for ongoing treatment (which may include injections, oral medications, and topical treatments) until you recover.
If you have a history of nasal allergies or asthma, you might also consider getting a blood test to check for allergens, such as pet dander.
Thank you!

Reply Date: 2015/09/17

More Info


Eczema, also known as atopic dermatitis, is a chronic inflammatory skin condition characterized by red, itchy patches on the skin. Understanding eczema involves recognizing its causes, symptoms, and potential solutions for managing severe itching, which can significantly impact daily life.

1. Causes of Eczema: Eczema can arise due to a combination of genetic, environmental, and immunological factors. The skin barrier in individuals with eczema is often compromised, making it more susceptible to irritants, allergens, and pathogens. Common triggers include:
- Irritants: Soaps, detergents, and certain fabrics can irritate the skin.

- Allergens: Pollen, pet dander, dust mites, and certain foods can provoke an allergic response.

- Weather: Extreme temperatures, humidity, or dryness can exacerbate symptoms.

- Stress: Emotional stress can trigger or worsen eczema flare-ups.

- Hormonal Changes: Fluctuations in hormones, particularly in women, can influence eczema severity.

In your case, the sudden onset of eczema on your face and arms, followed by intense itching, could be attributed to a new irritant or allergen exposure, even if you have not experienced eczema previously. It is also possible that your skin's sensitivity has changed over time due to various factors, including stress or environmental changes.

2. Understanding the Itching: The "all-over" itching sensation you described could be a result of several factors. Eczema can cause localized inflammation, which may lead to a systemic response, especially if the skin barrier is significantly compromised. Additionally, scratching can lead to further irritation and even secondary infections, which can exacerbate itching. The sensation of itching can also be influenced by psychological factors, where anxiety about the condition can heighten the perception of itchiness.

3. Allergic Reactions: While you mentioned that your pet has been with you for two years without issues, it is still possible to develop new allergies over time. Allergies can change, and exposure to pet dander may have become a trigger for your eczema. It is advisable to consult with an allergist for skin testing to identify potential allergens.

4. Healing Time: The duration for eczema to heal can vary widely among individuals. With appropriate treatment, including topical corticosteroids and antihistamines, many people see improvement within a few days to weeks. However, chronic eczema may require ongoing management to prevent flare-ups.

5. Managing Severe Itching: To alleviate itching, consider the following strategies:
- Topical Treatments: Continue using the prescribed topical medications. Corticosteroids can reduce inflammation and itching. Non-steroidal options, such as calcineurin inhibitors, may also be effective.

- Oral Medications: Antihistamines can help control itching, especially at night. If the itching is severe, your doctor may consider prescribing a stronger medication.

- Moisturizers: Regularly apply emollients to keep the skin hydrated. Look for fragrance-free and hypoallergenic products.

- Cool Compresses: Applying a cool, damp cloth to itchy areas can provide temporary relief.

- Avoid Triggers: Identify and avoid known irritants and allergens. This may include changing laundry detergents, avoiding certain fabrics, and managing stress levels.

In some cases, if the itching is unmanageable, dermatologists may consider systemic treatments, such as corticosteroids or newer biologic therapies, which target specific pathways in the immune response.

In conclusion, eczema is a multifaceted condition that requires a comprehensive approach to management. If your symptoms persist or worsen, it is crucial to follow up with your healthcare provider for further evaluation and tailored treatment options.

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