How US Dermatologist Dr. Abigail Waldman Uses Glycolic Acid To Transform Hair And Skin

Many people think chemical exfoliation is only for facial skin, but dermatologists highlight its benefits for the scalp and body as well. Dr. Abigail Waldman, a board-certified dermatologist at Mass General Brigham and Harvard associate professor, emphasizes that chemical exfoliants can improve skin texture, prevent buildup, and support a healthy scalp environment when used properly. Her approach is gentle, routine-based, and focused on avoiding irritation rather than chasing quick results.

Dr. Waldman’s method also demonstrates that exfoliation is not about overdoing products. Instead, it’s about timing, technique, and pairing exfoliation with moisture and barrier support.

Apply to a dry scalp

For those struggling with scalp buildup or flakiness, Dr. Abby recommends applying the exfoliant to dry hair. This allows the product to reach the scalp more effectively rather than being diluted by water. She advises tilting your head back and dispensing the product in a sweeping motion from front to back, ensuring full coverage without dripping into the hair. Massaging gently helps distribute the formula evenly and improves absorption.

Limit frequency to avoid irritation

Chemical exfoliants are effective but can be irritating if overused. Dr. Abby suggests starting every three days and adjusting based on skin tolerance. Overuse can lead to redness, dryness, or flakiness. By spacing treatments, the skin and scalp have time to recover and maintain a healthy barrier.

Use a gentle sweeping motion

Technique matters more than quantity. A controlled, sweeping motion ensures the exfoliant evenly covers the intended areas. On the scalp, this helps target clogged pores and removes dead skin cells without causing friction damage to hair follicles. On bumpy or textured skin, using a cotton pad or dispensing directly in a thin layer works well.

Pair exfoliation with moisture

After applying the exfoliant, moisturizing immediately is crucial. Dr. Abby stresses that chemical exfoliants are not meant to strip the skin; they encourage cell turnover, which can temporarily expose sensitive layers. A thick, nourishing moisturizer restores hydration, calms any potential irritation, and protects the barrier. This step is especially important for bumpy skin or areas prone to dryness.

No rinsing required

One of the biggest misconceptions about chemical exfoliants is that they must be washed off. Dr. Abby clarifies that leaving the product on allows it to work over time, gently breaking down dead cells and improving texture. Washing it off prematurely reduces effectiveness and prevents the full benefits of exfoliation.

Focus on clean skin first

Exfoliation should always be applied to freshly cleansed skin. Residual oil, dirt, or product buildup can interfere with absorption. Dr. Abby recommends doing this step before any other evening skincare products, to ensure the active ingredients penetrate effectively.

Adjust for skin sensitivity

Everyone’s skin tolerance differs. Dr. Abby encourages starting with a lower frequency and monitoring for irritation. Redness, burning, or peeling are signs to reduce usage. Over time, the skin can gradually tolerate more frequent applications if needed, but patience is key to safe and effective exfoliation.

Routine chemical exfoliation can improve overall texture, tone, and clarity. On the scalp, it helps reduce buildup, flakiness, and congestion. On the face or body, it minimizes bumpy texture and enhances the absorption of hydrating and barrier-supporting products, making the skin look smoother and healthier.

Dr. Abby’s method demonstrates that chemical exfoliation is not about aggressive, frequent treatments, but about routine, technique, and barrier protection. By applying to a dry scalp, spacing sessions, using gentle motions, moisturizing afterward, and leaving the product on, anyone can achieve smoother skin and a healthier scalp over time. Consistency, not overuse, is the key to sustainable results.