What are the potential harms of long-term use of mineral oil on the skin?

Long-term use of mineral oil on the skin may lead to various adverse effects, including clogged pores and acne breakouts, damaged skin barrier, dryness and dehydration, increased risk of skin irritation, and impaired normal skin metabolism. A detailed analysis is as follows:

1. Clogged Pores and Acne Breakouts: Mineral oil has large molecules and poor permeability, which makes it prone to forming a thick layer on the skin's surface with prolonged use, leading to clogged pores. When pores are blocked, sebum cannot be discharged normally and accumulates, forming comedones (blackheads or whiteheads), which may further trigger inflammatory acne. This effect is particularly noticeable in individuals with oily or acne-prone skin.

2. Damaged Skin Barrier: A healthy skin barrier helps retain moisture and protect against external irritants. Long-term reliance on the occlusive moisturizing effect of mineral oil can gradually weaken the skin’s natural ability to retain water, causing the barrier function to become compromised. Once mineral oil use is discontinued, the skin becomes more vulnerable to environmental factors, potentially resulting in sensitivity, redness, and other issues.

3. Dryness and Dehydration: Although the occlusive nature of mineral oil can temporarily prevent water loss from the skin surface, it does not provide hydration or nourishment. Prolonged use hinders normal interaction between the skin and air, disrupting the skin’s natural hydration process. As a result, moisture in the deeper layers of the skin may gradually diminish, leading to dry, rough texture.

4. Increased Risk of Skin Irritation: Some mineral oil products may contain impurities due to incomplete refining. Long-term skin contact with such impurities may cause irritation, including itching and burning sensations. In individuals with sensitive skin, this may even trigger contact dermatitis, characterized by symptoms such as redness, rashes, and papules.

5. Impaired Normal Skin Metabolism: The skin relies on open pores for respiration and metabolic processes, including waste elimination. Continuous use of mineral oil that blocks pores interferes with normal skin turnover, preventing dead skin cells from shedding properly. This can lead to dull, lackluster complexion and reduced skin radiance.

When selecting skincare products, it is essential to understand your skin type and specific needs, while also paying close attention to product ingredients and quality to ensure long-term safety and effectiveness.