The Cosmetic Purge Doesn’t Exist

There is a phrase that has become incredibly common in skincare:

“It’s normal to get worse at first. It’s purging. Just push through it, because your skin will get better afterwards.”

The problem is that this explanation can turn almost any deterioration into a supposed sign that a treatment is working.

And this is where an important distinction needs to be made:

A person can experience irritation, a temporary worsening of their skin, or a coincidental acne flare after starting a treatment. That does not mean that worsening is a necessary step for the treatment to work.

In fact, when researchers have looked specifically for evidence that topical acne treatments cause an initial worsening of acne as part of their mechanism of action, the evidence does not support the idea of a universal “purge.”

There are exceptions and specific situations that need to be understood — isotretinoin is one of them. But that is very different from saying that every effective skincare treatment has to make your skin worse first.

Where Did the “Skin Purging” Idea Come From?

The theory sounds intuitive.

The idea is that certain ingredients — particularly retinoids, exfoliating acids, and other “renewing” ingredients — accelerate cell turnover and bring existing clogged pores to the surface more quickly.

The explanation usually goes something like this:

Product → purge → all the hidden pimples come out → skin improves.

The problem is that a plausible explanation is not the same thing as a scientifically demonstrated explanation.

What Does the Evidence Actually Show?

A review published in the Journal of the American Academy of Dermatology specifically examined the idea that topical retinoids cause an initial worsening of acne.

The authors found no clinical trial evidence demonstrating that topical retinoids cause an initial acne exacerbation as an inherent part of their action. In fact, the available clinical data showed that acne could begin improving during the first weeks of treatment. PubMed – Initial acne exacerbation with topical retinoids

That distinction matters.

If “purging” were a necessary stage of effective acne treatment, we would expect to see it consistently and clearly in clinical trials.

We don't.

A Treatment Can Take Time to Work Without Making Your Skin Worse

This is another very common misconception.

A treatment can take several weeks before you see a significant improvement.

That does not mean that your skin has to get worse during those weeks.

For example, NICE guidance notes that the positive effects of topical acne treatments may take around 6–8 weeks to become noticeable. NICE – Acne vulgaris guidance

There is a huge difference between:

“My skin hasn't improved yet.”

and:

“My skin is getting worse because the treatment is working.”

The first statement can be completely reasonable.

The second requires evidence.

And this is where the idea of “purging” can become problematic: it can turn a possible adverse reaction into something that is interpreted as a positive sign.

So Why Do Some People Get More Pimples After Starting a Treatment?

Because several different things can be happening.

And not all of them are a “purge.”

1. Acne Naturally Fluctuates

Acne is not a completely static condition.

It can naturally get better and worse over time.

So if someone starts a new product and develops more lesions over the following weeks, that timing alone does not prove that the product caused the worsening.

The two events may simply have happened at the same time.

The review of topical retinoids mentioned above also notes that some patients may experience worsening during the first week or two because of the natural course of their acne, rather than because the retinoid is causing a specific “purge.” PubMed – Initial acne exacerbation with topical retinoids

2. The Product May Be Irritating Your Skin

This is very different.

Topical retinoids are well known to cause irritation, particularly when treatment is first started.

Redness, dryness, peeling, burning and stinging can occur, especially during the first weeks. PubMed – Tolerability of topical retinoids

And this is where a very common mistake happens:

“I started retinol and now I have more spots.”

The better question may be:

“Is my skin irritated?”

rather than:

“Am I purging?”

These are not the same thing.

3. Too Much, Too Soon

Retinoids are a perfect example.

Someone starts using retinol every night.

They use too much.

They combine it with exfoliating acids.

They don't moisturize enough.

And suddenly they have:

• dryness;

• peeling;

• tightness;

• burning;

• redness;

• increased sensitivity;

• and sometimes an apparent worsening of their skin.

Then someone tells them:

“Don't worry. It's just purging. Keep going.”

Maybe it isn't.

Maybe the skin is simply being exposed to more irritation than it can tolerate.

Clinical literature on topical retinoids describes irritation as a common early adverse effect, and factors such as concentration, formulation and frequency of application can influence tolerability. PubMed – Topical retinoids and irritation

This is why “more” does not necessarily mean “better.”

What About Getting Pimples After a Facial or Cosmetic Treatment?

This can happen too.

But again, that does not automatically mean that the treatment has “brought hidden pimples to the surface.”

Imagine a skin treatment involving several things at once:

• exfoliation;

• acids;

• retinoids;

• friction or manipulation;

• heat;

• occlusive products;

• multiple active ingredients.

If the skin becomes irritated, you may see redness, inflammation, burning, sensitivity and lesions that look like pimples.

And if the treatment involves too many products or too much irritation, your skin can simply look worse afterwards.

Calling all of this a “purge” doesn't actually tell us what happened.

It can even be counterproductive because it may encourage someone to continue irritating already-irritated skin.

Retinol: The “Purging” Explanation Is Especially Misleading

Retinol is probably one of the most common examples.

Someone starts using retinol.

They use it every night.

They apply too much.

They combine it with other active ingredients.

Their skin becomes irritated.

And instead of reducing the irritation, they are told:

“You just need to push through the purge.”

But irritation is not proof that the product is working.

In fact, current acne guidance emphasizes strategies to improve tolerance to topical treatments, including gradual introduction and measures to reduce irritation when appropriate. NICE – Acne vulgaris recommendations

The goal is not to see how much irritation your skin can survive.

The goal is to find a treatment and a routine that your skin can tolerate consistently.

An Important Exception: Oral Isotretinoin

Here we need to make an important distinction.

Oral isotretinoin can cause an initial worsening of acne in some patients.

The American Academy of Dermatology explains that some people experience worsening when they first start isotretinoin, although this does not happen to everyone. American Academy of Dermatology – Isotretinoin

There are also published reports describing significant inflammatory exacerbations during isotretinoin treatment. PubMed – Acne exacerbation during isotretinoin treatment

So yes:

There are real situations in which acne can initially worsen with a specific treatment.

But that does not prove the much broader claim that:

“Effective skincare treatments have to make you worse before they make you better.”

Those are completely different statements.

Isotretinoin is a specific medication with a specific pharmacological profile.

You cannot use what happens with oral isotretinoin to create a universal rule for retinol, acids, facials, serums or every other cosmetic treatment.

What About Topical Retinoids?

Topical retinoids are well-established acne treatments.

They are recommended in current acne guidelines and have demonstrated efficacy. PubMed – American Academy of Dermatology acne guidelines

But again:

Being an effective treatment is not the same as causing a “purge.”

Topical retinoids can irritate the skin, particularly when treatment begins.

Acne can also naturally fluctuate.

And the treatment may simply need time to produce a visible improvement.

But none of those facts establish that you have to develop more acne before the treatment can work.

Can a Retinoid Make a Pimple Dry Up Faster?

A treatment that is effective against acne can certainly change the course of individual lesions.

You may notice that some pimples resolve more quickly, become less inflamed, or dry out.

But this does not prove the “purge” theory.

A treatment can be working while your skin is also experiencing some irritation.

Efficacy and irritation can coexist.

That's precisely why we shouldn't interpret every change in the skin as evidence that a treatment is working.

What About Getting Worse for Three or Four Weeks?

This is where I would be particularly cautious.

There is a big difference between:

“My skin is a little dry and I have developed a few new spots.”

and:

“I've been getting progressively worse for three or four weeks.”

More inflammation.

More lesions.

More redness.

More sensitivity.

More peeling.

More burning.

And meanwhile someone tells you:

“Just keep going. It's the purge.”

That shouldn't automatically be accepted.

The fact that a treatment takes time to work does not mean that every deterioration during that period should be ignored.

There could be several explanations:

• the treatment may be too irritating;

• it may be being used too frequently;

• too many active ingredients may be combined;

• the skin barrier may be compromised;

• the acne may simply be fluctuating;

• the diagnosis may need to be reconsidered;

• or, with certain medications, there may be a known initial exacerbation that requires medical assessment.

The important thing is to work out what is actually happening, rather than automatically calling everything a “purge.”

So, Does Cosmetic Purging Actually Exist?

If by “purging” we mean:

“When a cosmetic product works, your skin has to get worse first because it is bringing all the hidden pimples to the surface.”

Then the scientific answer is much more nuanced:

There is not strong evidence to support this as a general rule for skincare.

We do have good evidence that certain active ingredients can cause irritation.

We know that acne naturally fluctuates.

We know that some treatments, such as oral isotretinoin, can cause an initial worsening in some patients.

And we know that cosmetic procedures can sometimes irritate the skin.

But none of that means that getting worse is a necessary stage of getting better.

The Problem With Calling Everything a “Purge”

This is where the word becomes particularly unhelpful.

You get pimples?

“It's a purge.”

You get more pimples?

“It's a purge.”

Your face is red?

“It's a purge.”

Your skin is peeling?

“It's a purge.”

Your skin burns?

“It's a purge.”

You've been getting progressively worse for a month?

“Keep going. It's working.”

At that point, the word is no longer explaining what is happening.

It is simply being used to justify it.

And that is the problem.

A good skincare explanation should help us distinguish between expected treatment effects, irritation, natural fluctuations, adverse reactions and genuine clinical worsening.

Not put everything into one convenient box.

Your Skin Doesn't Have to Get Worse to Prove That a Treatment Works

Sometimes skin needs time.

Sometimes it needs an adjustment period.

Sometimes you need to use less product.

Sometimes you need to introduce an active ingredient more gradually.

And sometimes you need to stop and reassess what is happening.

But we should be careful with the idea that:

“It gets worse because it's getting better.”

That is not a scientific principle.

A treatment should be judged by evidence, its expected effects, its adverse effects, the patient's response over time, and whether the overall course makes sense.

Worsening is not automatically proof of efficacy.

And “purging” should never become an excuse to ignore a skin reaction that is clearly getting worse.