Why overwashing can damage your skin barrier

As elaborate skincare routines continue to trend on social media, dermatologists are warning that one of the most common skincare mistakes may be surprisingly simple: washing your face too often.

From double cleansing to frequent exfoliation, many consumers have embraced the idea that more cleansing leads to healthier skin. Experts say excessive washing can disrupt the skin barrier, a protective layer that plays a critical role in keeping skin hydrated and resilient.

The skin barrier's protective ole

The skin barrier, known as the stratum corneum, is the outermost layer of the skin. It is made up of skin cells held together by lipids such as ceramides, cholesterol and fatty acids. This structure acts as a shield, helping to retain moisture while protecting the body from environmental irritants, pollutants and microbes.

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A key measure of skin barrier health is transepidermal water loss (TEWL), which refers to the amount of water that evaporates through the skin. Dermatology research has consistently shown that when the skin barrier is compromised, TEWL increases, making the skin more vulnerable to dryness, irritation and inflammation.

"The stratum corneum is not simply a passive layer but an active barrier essential for maintaining skin health," dermatologist and skin barrier researcher Peter M. Elias has written in his work on epidermal barrier function.

What happens when you overwash?

While cleansing is necessary to remove sweat, dirt, sunscreen and excess oil, washing too frequently can strip away the natural lipids that help maintain the barrier.

Harsh cleansers, repeated washing, hot water and excessive exfoliation can all contribute to barrier disruption. When the skin loses too much of its protective oil layer, it may struggle to retain moisture, resulting in dryness, tightness and sensitivity.

Common signs of a damaged skin barrier include redness, flaking, rough texture, burning sensations and increased sensitivity to skincare products. Some people may also notice that products they previously tolerated well suddenly begin to sting or irritate the skin.

Over-cleansing can also be counterproductive for those with acne-prone skin. Acne is not caused by poor hygiene, and dermatologists caution that repeatedly stripping the skin of its natural oils may trigger increased sebum production, potentially contributing to clogged pores and inflammation.

The double-cleansing question

Double cleansing, typically using an oil-based cleanser followed by a water-based cleanser, has become a staple of many skincare routines. While the practice can be effective for removing heavy makeup, water-resistant sunscreen and pollution, experts say it is not necessary for everyone.

People with dry, sensitive or reactive skin may be more susceptible to irritation if they cleanse too aggressively. Dermatologists generally recommend tailoring cleansing habits to individual skin needs rather than following trends or complex routines.

A simpler approach to healthy skin

Most dermatologists recommend washing the face once or twice daily with a gentle, pH-balanced cleanser and lukewarm water. For individuals experiencing signs of barrier damage, simplifying a skincare routine and prioritising moisturisers containing ingredients such as ceramides and hyaluronic acid may help support recovery.

The skin barrier is remarkably resilient, and in many cases it can recover when irritants are removed and hydration is restored. As experts increasingly emphasise, achieving healthy skin is often less about doing more and more about avoiding unnecessary stress on the skin's natural protective systems.