The K-Beauty Exfoliation Guide: Toner Pads, AHA, BHA and PHA, Peeling Gels and Scrubs, and How Often to Exfoliate for Your Skin Type

You cleanse carefully, moisturise every day and wear sunscreen, yet your skin still looks a little rough and dull, and your foundation seems to cling to dry patches. If that sounds familiar, it may be time to look at one step that is easy to overlook or to get wrong: exfoliation.

In Korea, gently "tidying up" the skin's surface, known as gakjil jeongni (각질 정리), is treated as a normal part of skincare rather than an occasional extra. Korean drugstores are full of exfoliating toner pads, peeling gels, mild acid toners and wash-off masks, and many of these products have become popular around the world. Yet exfoliation is also one of the steps most likely to cause problems when done too often or too harshly. More is not better. The secret is to find the right method and frequency for your own skin.

In this guide we look at why dead skin cells build up, explain the difference between physical and chemical exfoliation, introduce the main exfoliating acids used in K-beauty, show how to use popular Korean product types, and suggest a sensible starting frequency for each skin type. We also cover the warning signs of over-exfoliation and how to help your skin recover. As always, this guide is general information; if you have a skin condition or persistent irritation, please consult a dermatologist.

Why does dead skin build up?

The outermost layer of your skin, the stratum corneum, is made up of flattened cells held together by lipids, a little like bricks and mortar. This layer is far from useless. It protects the skin from external irritants and helps prevent water from evaporating. In other words, it is a vital part of the skin barrier.

Your skin constantly renews itself. New cells form in the deeper layers and gradually move upwards, while the oldest cells at the surface are shed naturally. This process is often called skin turnover. When everything works smoothly, you do not notice it at all. However, factors such as dry air, cold weather, sun exposure, age and some skincare habits can slow down the shedding process. When old cells linger on the surface, the skin may look dull, feel rough to the touch and absorb moisturiser less evenly. Makeup can also look patchy.

Exfoliation simply helps loosen and remove these excess surface cells. The goal is not to strip away the protective layer, but to help the skin's natural cycle run smoothly. Keeping this in mind is the key to exfoliating safely.

Physical exfoliation: scrubs, peeling gels and cloths

Physical exfoliation removes dead cells through gentle friction. This includes scrubs with fine particles, peeling gels, textured cleansing pads and exfoliating cloths. The effect is immediate: skin feels smoother straight away, which is why many people enjoy this method.

The downside is that it is easy to overdo. Scrubbing too hard, using particles with sharp or uneven edges, or exfoliating too frequently can irritate the skin and weaken its barrier. If you choose a scrub, look for fine, smooth, rounded particles, use light circular movements with your fingertips, and never press hard. Avoid the delicate area around the eyes.

Peeling gels are a popular Korean product type. You apply the gel to dry skin, wait a few seconds, then gently rub with your fingertips. Small rolls, often described as "pills", start to form, and many people assume these are pure dead skin. In fact, a large part of these rolls is usually the product's own ingredients clumping together as they react with the skin and the rubbing motion, along with some loosened surface cells. This does not mean peeling gels do not work, but you should not judge their effect, or keep rubbing, based on how many rolls appear. Rinse thoroughly with lukewarm water afterwards.

Chemical exfoliation: AHA, BHA and PHA

Chemical exfoliation uses mild acids or enzymes to loosen the bonds between dead skin cells so that they can be shed more easily. There is no scrubbing involved, which is why many skincare experts consider well-formulated chemical exfoliants to be more even and controllable than physical ones. In K-beauty, three groups of acids are especially common.

AHA (alpha hydroxy acids)

AHAs include glycolic acid, lactic acid and mandelic acid. They are water-soluble and work mainly on the surface of the skin, helping to loosen dull, rough cells. AHAs are often chosen by people with dry, dull or uneven-textured skin. Glycolic acid has the smallest molecule and can be the most active, while lactic and mandelic acids are generally considered gentler options. AHAs can make skin more sensitive to the sun, so sunscreen is essential when using them.

BHA (beta hydroxy acid)

The main BHA used in skincare is salicylic acid. Unlike AHAs, it is oil-soluble, which means it can work within the oily environment of pores. For this reason, BHA is popular with people who have oily skin, visible pores, blackheads or a tendency towards breakouts. Many Korean "pore care" toners and pads contain BHA, sometimes listed as betaine salicylate, a milder related ingredient. People who are allergic to aspirin or salicylates, or who are pregnant, should check with a doctor before using salicylic acid products.

PHA (polyhydroxy acids)

PHAs, such as gluconolactone and lactobionic acid, have larger molecules than AHAs, so they penetrate more slowly and tend to work more gently. They also have moisture-attracting properties. PHAs have become very popular in K-beauty as a starting point for beginners and people with sensitive skin who find other acids too strong.

Enzymes

Some Korean cleansing powders and masks use enzymes derived from fruits such as papaya or pineapple, which gently break down the proteins that hold dead cells together. Enzyme powders are often mixed with water and used as a gentle wash, typically a few times a week.

Comparing the main exfoliating ingredients

Ingredient	Works on	Often chosen for	Intensity
AHA (glycolic, lactic)	Skin surface	Dryness, dullness, rough texture	Medium to strong
BHA (salicylic acid)	Surface and inside pores	Oily skin, pores, blackheads	Medium
PHA (gluconolactone)	Skin surface, slowly	Sensitive skin, beginners	Gentle
Enzymes	Surface proteins	Gentle regular cleansing	Gentle
Fine scrub	Surface, by friction	Instant smoothness	Varies with pressure

Popular K-beauty exfoliating products and how to use them

Toner pads

Toner pads are one of the most iconic K-beauty product types. They are cotton or non-woven pads soaked in a toner that often contains AHA, BHA, PHA or soothing ingredients, packed in a jar. Many pads have two sides: a textured, embossed side for gentle exfoliation, and a smooth side for soothing or for applying toner to the skin.

To use a toner pad, take one out with the tweezers that are often included, then sweep it gently across clean skin, following the direction of your skin's natural lines, from the centre of the face outwards. Do not scrub back and forth. Some people place a soaked pad on the cheeks for a minute or two as a mini mask. Pads vary greatly in strength. Some gentle pads are designed for daily use, while those with higher acid levels are intended for only a few times a week. Always follow the product instructions.

Exfoliating toners and essences

Liquid exfoliating toners are applied with a cotton pad or patted on with clean hands, usually after cleansing. They offer more control over how much product you use than pre-soaked pads.

Peeling gels

As explained above, peeling gels are applied to dry skin and gently rubbed in small circles before rinsing. Use them sparingly, and stop rubbing once you have covered the area.

Wash-off masks and enzyme powders

Clay masks with mild exfoliating ingredients and enzyme cleansing powders are another gentle option, usually used once or twice a week. They are particularly popular for people who want a little extra care for pores on the nose and forehead.

How often should you exfoliate? A starting point by skin type

There is no single correct frequency, because everyone's skin, climate and routine are different. The table below offers a cautious starting point. Begin at the lower end, watch how your skin responds over a few weeks, and adjust gradually.

Skin type	Suggested method	Starting frequency
Oily, visible pores	BHA toner or toner pads	2–3 times a week
Dry, dull	Low-strength AHA or PHA	1–2 times a week
Combination	BHA mainly on the T-zone	About twice a week
Sensitive	PHA or a very gentle peeling gel	Once a week or less
Normal	Any gentle method	1–2 times a week

Seasons also matter. Many people find they can exfoliate a little more often in humid summer months and need to cut back in dry, cold winter weather, when the skin barrier is more easily stressed.

Building exfoliation into your routine

Exfoliation is usually done in the evening, after cleansing and before the rest of your routine. A simple evening routine on an exfoliating night might look like this:

1. Cleanse gently, using double cleansing if you wore sunscreen or makeup.
2. Apply your exfoliating toner or toner pad, or use a peeling gel and rinse.
3. Follow with a hydrating, soothing toner or essence.
4. Apply a moisturiser to support the skin barrier.

The next morning, apply a broad-spectrum sunscreen generously, because freshly exfoliated skin, especially after AHAs, can be more sensitive to UV rays.

Ingredients to avoid combining

To reduce the risk of irritation, avoid using several strong active ingredients on the same night. For example, many people prefer not to use acid exfoliants on the same evening as retinol or retinoid products, high-strength vitamin C, or other exfoliants. A common approach is to alternate: an exfoliation night, a retinol night and one or two "rest" nights with only gentle hydrating products. If you use prescription skincare, ask your doctor how to combine it with exfoliants.

Patch testing

Before using a new exfoliating product on your whole face, try a small amount on a discreet area, such as behind the ear or along the jawline, for a few days. If you notice redness, itching or stinging that does not settle, do not use the product on your face.

Signs you are over-exfoliating

Over-exfoliation is one of the most common skincare mistakes. Watch for these signs:

• Stinging or burning when you apply products that never bothered you before
• Redness, tightness or a shiny, "plastic-like" appearance
• New dry, flaky patches or increased sensitivity
• More breakouts or small bumps than usual

If you notice these signs, stop all exfoliation for a while. Switch to a simple routine with a gentle cleanser, a soothing toner and a barrier-supporting moisturiser with ingredients such as ceramides, panthenol or centella asiatica, and always wear sunscreen. Most mild irritation settles with rest, but if your symptoms are severe, painful or persist, or if you have conditions such as eczema, rosacea or active acne, see a dermatologist rather than trying to treat it yourself.

Body exfoliation, the Korean way

Exfoliation in Korea is not limited to the face. Public bathhouses, known as mogyoktang (목욕탕), are famous for the tradition of body scrubbing with a textured cloth often called an "Italy towel" (이태리타월). After soaking in hot water to soften the skin, people rub the cloth over their body, and many bathhouses offer professional scrub services. At home, many Koreans use body scrubs or gentle exfoliating washes. Body skin is generally thicker than facial skin, but the same principles still apply: do not scrub too hard or too often, avoid irritated or broken skin, and moisturise well afterwards.

Exfoliating different areas of the face

Even within one face, different areas can behave quite differently. Many people find that targeting each area separately gives better results with less irritation.

• Nose and forehead (T-zone): These areas usually produce the most oil and tend to show visible pores and blackheads. A BHA toner or pad used here two or three times a week often works well, even if the rest of your face needs gentler care.
• Cheeks: Cheeks are often drier and more sensitive, particularly in winter. PHA or low-strength lactic acid products are usually a better match, used once or twice a week.
• Chin and jawline: Some people experience occasional breakouts in this area. Gentle BHA can be helpful, but avoid scrubbing over any active, inflamed spots.
• Around the eyes: The skin here is very thin and delicate. Keep exfoliating products away from the eye area unless a product is specifically designed for it.
• Lips: Lips can become dry and flaky, especially in cold weather. Instead of using facial acids, try a dedicated lip scrub, or apply lip balm and gently wipe away loosened flakes with a soft, damp cloth. Follow with plenty of balm.

Common exfoliation mistakes

Most exfoliation problems come from a handful of simple mistakes. Avoiding them will take you a long way.

• Exfoliating every day to see faster results: It can be tempting to increase frequency when you want quick improvement, but this often weakens the skin barrier and leads to redness and sensitivity. Results come from consistency, not intensity.
• Layering several exfoliants at once: Using a toner pad, a peeling gel and an acid serum on the same night can easily overload your skin. Choose one exfoliating step per session.
• Skipping sunscreen: Freshly exfoliated skin can be more vulnerable to UV damage. Applying sunscreen the next morning, and reapplying during the day if you are outdoors, is essential.
• Mistaking stinging for effectiveness: A slight tingle can be normal with some acids, but strong stinging, burning or lasting redness is a sign of irritation, not proof that a product is working.
• Exfoliating irritated or broken skin: Avoid exfoliating over cuts, sunburn, active inflammation or areas that have just been waxed or shaved.
• Ignoring the instructions: Product strength varies enormously. Always read the recommended frequency and directions for each product, rather than assuming all exfoliants can be used the same way.

Exfoliation and makeup

One of the reasons exfoliation is so popular in Korea is its effect on makeup. Korean makeup styles often focus on a smooth, luminous complexion, sometimes described as "glass skin" or "dewy skin". When dry flakes build up on the surface, cushion compacts and foundations can cling to them and look patchy. Gentle, regular exfoliation helps base makeup sit more smoothly.

If you have an important event, avoid trying a new or strong exfoliant the night before, in case your skin reacts. It is safer to exfoliate gently two or three days in advance using a product you already know suits you, and then focus on hydration the night before.

How long before you see results?

With gentle exfoliation, many people notice that their skin feels smoother after just a few uses. However, more visible changes in overall texture and brightness usually take several weeks of consistent care, because skin renewal is a gradual process. Instead of increasing frequency or strength when you do not see immediate changes, keep the same routine for at least a few weeks and observe how your skin responds. Taking photos in the same light every couple of weeks can help you notice gradual improvements.

Choosing your first exfoliant: a simple guide

If you are new to exfoliation, the number of options can feel overwhelming. A few simple questions can help you narrow them down.

• Is your skin easily irritated? Start with a PHA toner or a gentle, low-strength toner pad, used once a week.
• Are oiliness, pores or blackheads your main concern? A BHA toner or pad, used two or three times a week, is a common first choice.
• Is dryness or dullness your main concern? Try a low-strength lactic acid or mandelic acid product, or a PHA, once or twice a week.
• Do you prefer an instant, tactile result? A mild peeling gel or a scrub with very fine, smooth particles, used gently once a week, may suit you.

Choose just one product to begin with, so that if your skin reacts you will know the cause. Reading the ingredient list can also help: in many countries, ingredients are listed in descending order of concentration, so an exfoliating acid near the top of the list often indicates a stronger formula. When in doubt, start gentle. You can always move to a stronger product later once you know how your skin responds.

Frequently asked questions

Can I use toner pads every day?

It depends on the product. Some low-strength pads are formulated for daily use, while those with higher concentrations of acids are meant for a few times a week. Follow the instructions and pay attention to how your skin feels.

Should I exfoliate in the morning or evening?

Evening is generally recommended, because exfoliated skin can be more sensitive to the sun, and your skin can rest overnight. If you exfoliate in the morning, sunscreen is even more important.

Is chemical exfoliation better than physical exfoliation?

Neither is automatically better. Chemical exfoliants tend to work more evenly and are easier to control, while gentle physical exfoliation can feel satisfying and work well for some people. The best choice depends on your skin type, sensitivity and preferences.

Can people with acne exfoliate?

Many people with oily or acne-prone skin use BHA products as part of their routine. However, inflamed or severe acne needs gentle care, and harsh scrubbing can make it worse. If you have persistent or painful breakouts, consult a dermatologist for advice suited to your skin.

Can I exfoliate if I am pregnant?

Some exfoliating ingredients, particularly high-strength salicylic acid, are often discussed with caution during pregnancy. Please ask your doctor or midwife before using exfoliating products during pregnancy or breastfeeding.

Final thoughts: gentle and steady wins

Exfoliation is not about scraping your skin clean. It is about gently helping your skin's natural renewal process, so that its surface looks smoother and brighter while its protective barrier stays strong. Start with a mild product and a low frequency, protect your skin with moisturiser and sunscreen, and listen carefully to how it responds. In skincare, as in so many things, consistent gentle care almost always works better than intense effort. Your skin will thank you for your patience.