Understanding Skin Rashes from PM2.5 Dust with Chula Pharmacists

    A few weeks ago, we discussed the impact of dust, but recently, many people have been experiencing itchy skin rashes due to PM2.5 dust. While this fine dust is widely known for its harmful effects on the respiratory system, it can also irritate the skin—especially for individuals with sensitive skin.

How PM2.5 Affects the Skin

    PM2.5 dust contains chemicals and heavy metals that can damage the skin. Prolonged exposure may lead to:

    People with pre-existing skin conditions such as atopic dermatitis or psoriasis are at a higher risk. Those sensitive to PM2.5 may experience red rashes, dry or peeling skin, intense itching, or even blisters. Symptoms can worsen in individuals with chronic skin issues.

How to Protect Your Skin from PM2.5

    If you experience skin irritation from PM2.5, consider these self-care tips:

    1.Proper Skin Cleansing – Use a gentle cleanser to remove dust and dirt. Shower or wash exposed areas immediately after being outdoors.

    2.Moisturize Regularly – Apply a moisturizer with skin-protective ingredients like ceramide, niacinamide, or antioxidants to maintain hydration and strengthen the skin barrier.

    3.Avoid Irritants – Stay away from harsh soaps, alcohol-based products, and strong fragrances that can aggravate skin sensitivity.

    4.Stay Hydrated – Drink plenty of water to keep your skin hydrated and resilient.

    5.Minimize Exposure – While avoiding PM2.5 entirely is difficult, you can protect yourself by:

    6.Seek Medical Advice – If symptoms persist or worsen, consult a dermatologist.

Medications for Itchy Rashes

    For those experiencing discomfort, the right medication can help relieve symptoms and speed up recovery. There are two main types of treatments:

Herbal Remedies for Relief

    In addition to conventional medicine, herbal-based lotions or creams may help alleviate symptoms. Popular options include:

🌿 Aloe Vera – Soothes irritation, moisturizes, and reduces redness

🌿 Gotu Kola – Known for its wound-healing and anti-inflammatory properties

    Before using herbal products, perform a patch test to check for allergic reactions. If irritation worsens, discontinue use and seek medical advice.

    By taking these preventive and treatment measures, you can better protect your skin from PM2.5 dust and maintain healthy, irritation-free skin.

Assoc. Prof. Dr. Nattada Areepiam and Assoc. Prof. Dr. Bodin Tiwasuwan

Faculty of Pharmacy Chulalongkorn University