Skin purging vs breakouts: what does skin purging look like?

Skin purging is something some people with breakout-prone skin can experience after using a leave-on exfoliant, retinoid or certain other active ingredients for the first time. The theory is that these formulas help bring clogs that are already forming deep within the pore to the surface faster than they would have appeared on their own.

This can mean that, seemingly overnight, you notice a fresh crop of breakout-like bumps, blackheads or whiteheads across the areas where you have applied the new formula. Although this can feel like your skin is getting worse, skin purging is usually temporary. Once the purging phase tapers off, skin should start to look clearer, smoother and more even.

The original version of this article was reviewed by Beth McLellan, MD, USA

So, how can you tell if your skin is purging or breaking out? Here’s everything you need to know.

Table of contents:
What is skin purging?
What causes skin purging?
Is skin purging good?
What does skin purging look like?
Skin purging vs breakout: what’s the difference?
Does skin purging have to happen?
How long does skin purging last?
How to speed up skin purging?

What is skin purging?

Skin purging is a temporary reaction that can happen when certain active ingredients speed up the way skin cells move from the lower layers of skin to the surface. This process can bring existing clogged pores to the surface more quickly, making them appear as blackheads, whiteheads, small bumps or breakout-like spots.

In other words, purging does not create new clogged pores from nothing. Instead, it can make clogs that were already forming beneath the skin appear faster.

Skin purging is most often linked to ingredients that increase cell turnover or help clear clogged pores, such as:

Salicylic acid, also known as BHA
Other leave-on chemical exfoliants
Retinoids, including retinol
Benzoyl peroxide
Occasionally, azelaic acid

What causes skin purging?

Skin purging can be caused by using a chemical exfoliant that loosens build-up inside the pore and speeds up cell turnover. As this happens, clogs that were already developing deeper in the pore can move to the surface faster (1,2).

A similar effect can happen with retinoids, which influence how skin cells move from the lower layers to the surface. Benzoyl peroxide may also cause purging because of the way it helps unclog pores and target acne-causing bacteria. Although less common, azelaic acid can sometimes cause light purging when first introduced into a routine.

Purging is most likely to happen in areas where you usually experience breakouts, blackheads or clogged pores. If bumps appear in completely new areas, or your skin becomes very red, itchy, swollen or uncomfortable, it may be irritation rather than purging.

Does salicylic acid cause purging?

Yes, salicylic acid, also known as BHA, can cause purging for some people. Salicylic acid, also known as BHA, is the chemical exfoliant most commonly associated with skin purging because it is oil-soluble. This means it can penetrate into the pore, where it helps break apart clumps of dead skin cells and excess sebum.

Salicylic acid also helps improve the shape of the pore lining, so backed-up clogs can move to the surface more easily. These clogs may appear as blackheads, whiteheads or small bumps.

So, can salicylic acid cause acne? Not exactly. BHA skincare does not usually cause new acne to form. Instead, it may bring existing clogs to the surface faster, which can look like a sudden breakout at first. With continued use, BHA can help reduce clogged bumps and support clearer-looking skin over time (3).

Does benzoyl peroxide cause purging?

Benzoyl peroxide can cause purging for some people when first introduced into a routine. It is often used for acne-prone skin because it helps unclog pores and target acne-causing bacteria, but this action can initially make existing clogs appear more visible.

However, what you are seeing may not always be purging. Sometimes, you may start a new formula at the same time your skin was already about to go through a breakout cycle. This is especially common around hormonal changes, including the menstrual cycle.

If your skin becomes very dry, irritated, sore or inflamed after using benzoyl peroxide, this may be a sign of irritation rather than purging. In most European countries, benzoyl peroxide is available as an acne treatment through a pharmacy or with medical guidance, so follow the advice provided with your treatment (4).

Does retinol cause purging?

Yes, retinol can cause purging for some people, especially when first introduced into a skincare routine. Retinol is a type of retinoid that helps speed up skin cell turnover, which means it can bring existing clogs beneath the surface to the top of the skin more quickly.

A retinol purge can look like a sudden increase in small bumps, whiteheads, blackheads or breakout-like spots, usually in areas where you already tend to get clogged pores or blemishes. Retinol purging is usually temporary and should improve as your skin adjusts.

If your skin becomes very sore, irritated, flaky, swollen or the breakouts continue beyond several weeks, it may not be purging. It could be irritation, overuse or a sign that the formula is not right for your skin. To reduce the chance of irritation, introduce retinol slowly, use it at night and always apply SPF during the day.

Does niacinamide cause purging?

No, niacinamide does not usually cause purging. Unlike ingredients such as retinol, salicylic acid or other exfoliants, niacinamide does not work by speeding up skin cell turnover or pushing clogged pores to the surface.

Niacinamide is generally used to help support the skin barrier, improve uneven tone, reduce the look of enlarged pores and calm visible redness. If you notice new spots after starting a niacinamide product, it is more likely to be a breakout, irritation or sensitivity to the overall formula rather than true skin purging.

If this happens, check whether you have introduced other new products at the same time, whether the formula feels too rich for your skin type or whether you are using a high-strength niacinamide product too often. If your skin feels uncomfortable, reduce how often you use it or stop using it and switch to a gentler formula.

Does azelaic acid cause purging?

Azelaic acid can cause light purging for some people, although this is less common than with salicylic acid or retinoids. Azelaic acid is often used to help improve the look of breakouts, post-breakout marks, redness and uneven tone, but some people may notice small bumps or clogged pores coming to the surface when they first start using it.

As with any active ingredient, introduce azelaic acid gradually and pay attention to how your skin responds. If your skin feels irritated, stings excessively or becomes very dry, reduce how often you use it or pause use and reassess your routine.

Is skin purging good?

Skin purging can be frustrating, but it is not always a bad sign. If it happens after starting an ingredient known to increase cell turnover or clear clogged pores, it may simply mean that existing clogs are coming to the surface faster.

That said, you do not need to experience purging for a formula to be effective. Skin does not have to get worse before it gets better. Some people see gradual improvement without any purging at all.

What does skin purging look like?

Skin purging can look very similar to regular breakouts, which is why it can be difficult to recognise. It often appears as small bumps, blackheads, whiteheads or breakout-like spots in the areas where you usually experience clogged pores.

Skin purging may look like:

Small flesh-coloured bumps
Blackheads or whiteheads
Red bumps in areas where you applied the new formula
Rough or uneven texture
Mild dryness or flaking alongside bumps
Breakout-like clusters in your usual breakout areas

Skin purging whiteheads tend to look less inflamed than deeper, more painful breakouts. Purging is more likely to involve clogged pores and small bumps rather than inflamed pustules, nodules or cystic acne. However, this is not an absolute rule, so timing and location are important clues.

Skin purging vs breakout: what’s the difference?

The easiest way to tell the difference between skin purging and breakouts is to look at timing, location and the type of formula you have recently added to your routine.

Your skin may be purging if:

You recently started using a formula known to cause purging, such as BHA, a retinoid or benzoyl peroxide
The bumps appear in areas where you usually get clogged pores or breakouts
You are seeing mostly blackheads, whiteheads or small bumps
The reaction starts soon after introducing the new formula
The bumps begin to improve after a few weeks of consistent use

Your skin may be breaking out or reacting badly if:

Spots appear in areas where you do not usually break out
The breakouts are painful, swollen or very inflamed
Your skin feels itchy, burning, sore or unusually sensitive
The reaction gets worse the longer you use the formula
Your skin does not improve after several weeks
You have recently added several new formulas at the same time

Dr Beth McLellan recommends sticking with a formula that is known to cause purging but not breakouts, such as a leave-on exfoliant containing 1–2% salicylic acid. Over time, blackheads and bumps should improve. If they do not, you may need to consider other factors in your routine or seek advice from a dermatologist (5).

What if I’m still breaking out more than usual?

If you are still breaking out more than usual after 6–8 weeks, consider whether it is really purging. Your skin may not be responding well to the formula, or there may be other triggers in your routine or lifestyle.

For more information on how to get rid of acne, read our article.

You may be dealing with breakouts rather than purging if the bumps are becoming more inflamed, spreading to new areas or not improving with time. For some people, an unwanted reaction to skincare can be a form of irritant contact dermatitis, especially if the skin feels itchy, sore, burning or very dry.

If your skin does not seem to be getting through the adjustment period, stop using the formula and look for a gentler alternative. If breakouts persist or feel difficult to manage, speak to a dermatologist for advice on the best next steps and look into products for breakouts.

Does skin purging have to happen?

No, skin purging does not have to happen. The idea that your skin has to get worse before it gets better is not true for everyone.

Some people experience purging when they first use a leave-on exfoliant, retinoid or other active ingredient. Others do not purge at all and still see good results. Why purging happens to some people and not others remains unclear, just as some people are more prone to blackheads and whiteheads while others are more prone to inflamed breakouts.

If you do experience purging, it can be tempting to stop using the formula immediately. If the reaction is mild and looks like typical purging, try giving your skin a few weeks to adjust. If your skin feels painful, very irritated or increasingly inflamed, stop using the formula and reassess.

How long does skin purging last?

Skin purging often starts within the first few days to first few weeks after introducing a new active ingredient. This can vary depending on your skin, the ingredient, how often you use it and whether you already had clogged pores forming beneath the surface.

Skin purging is temporary. It usually lasts for about one full skin cycle, which is around 4–6 weeks. For some people, it may take closer to 8 weeks to settle.

If you are still breaking out more than usual after 6–8 weeks, it may not be purging. Your skin may be reacting to the formula, or your breakouts may be linked to other factors such as hormones, medication, stress, your wider routine or the natural progression of acne-prone skin.

If your skin is not improving as much as you would like, consider speaking to a dermatologist for personalised advice.

How to speed up skin purging?

There is no proven way to speed up skin purging once it begins. However, you can avoid prolonging the process by keeping your routine gentle and consistent.

To support your skin while purging:

Do not introduce more active ingredients that can cause purging
Avoid using multiple exfoliants or retinoids at the same time
Moisturise with replenishing, barrier-supportive ingredients
Avoid picking, squeezing or scrubbing bumps
Use broad-spectrum SPF 30 or higher every day
Pause professional peels, laser treatments or harsh facials until skin has settled
Keep the rest of your routine simple and gentle

It may feel tempting to do more, but overdoing active ingredients can increase irritation and make it harder to tell whether your skin is purging, breaking out or reacting.