Eczema is a pervasive skin condition that plagues Hong Kong residents, particularly during the humid spring season. With studies indicating that approximately one in five local children suffers from varying degrees of eczema and skin sensitivities, the condition has become a significant public health concern. Medical experts from both Western and Traditional Chinese Medicine (TCM) disciplines are now shedding light on the complex origins of the ailment and emphasizing the critical role of diet and lifestyle in managing flare-ups.
Understanding the Root Causes
According to Dr. Lo King-fan, a specialist in dermatology, eczema stems from a “double defect” involving the skin barrier and the immune system. A compromised keratin layer allows external irritants—such as dust mites and pollutants—to penetrate the skin, triggering an overactive immune response. This reaction leads to inflammation, swelling, and potential bacterial infections, notably by Staphylococcus aureus, which can cause characteristic yellow discharge.
Dr. Lo highlights that early life factors significantly influence susceptibility. Research suggests that infants born via Caesarean section may miss crucial exposure to the mother’s vaginal lactobacillus, increasing allergy risks. Furthermore, breastfeeding serves as a vital protective measure; lacking breast milk, which contains essential antibodies and probiotics, correlates with a 10-20% higher incidence of severe eczema and food allergies in later childhood.
From a TCM perspective, practitioner Hui Su-fang attributes eczema to internal imbalances involving “dampness” and “wind.” The location of the rash often signals specific organ dysfunctions. For instance, dampness, being heavy and sinking, typically manifests in the lower body, while wind dominates when rashes appear on the upper body or face.
Dietary Strategies: What to Avoid
Diet plays a pivotal role in modulating the immune system and gut health. Dr. Lo warns that an imbalanced gut microbiome can exacerbate eczema, advising patients to limit foods that feed harmful bacteria.
- Processed and High-Sugar Foods: Items like sausages, instant noodles, and packaged cakes disrupt intestinal flora.
- Fried and Greasy Foods: High-fat content promotes the growth of detrimental gut bacteria, triggering inflammation.
TCM practitioners advocate for stricter restrictions to manage internal heat and dampness. Patients are advised to eliminate spicy stimuli, seafood (specifically shrimp and crab), and certain meats like goose and mutton. Additionally, “heat-inducing” fruits such as durian, pineapple, and bamboo shoots should be consumed with caution.
Beneficial Foods and Remedies
Both medical approaches agree on the importance of a balanced diet. Dr. Lo recommends incorporating probiotics and high-fiber foods—such as yogurt, legumes, and fresh vegetables—to restore gut health.
For TCM relief, Hui suggests foods that clear heat and expel dampness, including:
- Mung beans
- Winter melon
- Coix seed (Job’s tears)
- Corn silk
A recommended therapeutic remedy is the Spleen-Strengthening Dampness-Removing Soup, combining Poria, Atractylodes, and Chinese yam to regulate internal functions.
Dispelling Common Myths
A prevalent misconception is that beef induces allergic reactions. Dr. Lo clarifies that beef protein has an extremely low allergenic potential; actual reactions are often caused by preservatives like sulfur dioxide used in meat storage or the consumption of spoiled meat.
Regarding the popular home remedy “egg oil,” experts urge caution. Many marketed versions are actually burnt oils (tar), which can be irritating or carcinogenic in high concentrations. Patients are encouraged to use verified moisturizers or medical-grade tar products instead.
Conclusion
Managing eczema requires a holistic approach that combines medical treatment with dietary vigilance. Patients are advised against arbitrary food restrictions, which can lead to nutritional deficiencies, and should instead seek professional testing to identify specific allergens. By understanding the interplay between gut health and skin barriers, sufferers can better navigate their dietary choices for lasting relief.