Will PDRN Cause Purging? Purge vs Breakout Explained

Short answer: Probably not from PDRN itself, but no study has looked for it, so this cannot be ruled out. "Purging" describes a temporary flare linked to ingredients that speed up skin cell turnover, such as retinoids and exfoliating acids. PDRN is not known to work that way. Any product, including a PDRN product, can still cause breakouts or irritation, and PDRN products that also contain retinoids or acids may cause a purge-type flare because of those ingredients.

Will PDRN cause purging? "Is my skin purging?" is one of the most common questions after starting a new product, and getting the answer right matters. You can usually push through a purge, but you should stop a product that is causing breakouts. This guide explains what purging is, why PDRN itself is not expected to cause it, when a PDRN product might, and how to tell the difference. If you are getting spots, also see will PDRN cause acne.

Key takeaways

• Purging is a temporary flare caused by ingredients that speed up skin cell turnover, mainly retinoids and exfoliating acids[1].

• PDRN's proposed actions are repair signalling, not exfoliation, so it is not expected to cause a purge, although this has not been studied[2].

• PDRN products that also contain retinoids or exfoliating acids may cause a purge-type flare because of those ingredients[1,3].

• Spots, itching or stinging can also be a breakout or irritation, which is a reason to stop rather than push through.

• A UK dermatologist describes purging as lasting two to eight weeks, improving from about week six[1].

What is skin purging?

Your skin is constantly renewing itself, with new cells forming below and old cells shedding from the surface. Under the surface there are often microcomedones, tiny blockages that have not yet become visible spots.

Some ingredients speed up this renewal. When that happens, existing blockages surface faster than usual, causing a temporary flare of small spots, blackheads and whiteheads. This is purging[1]. It is most often seen with:

• Retinoids, such as retinol, retinal, adapalene and tretinoin[1,4]

• Exfoliating acids, such as glycolic, lactic and salicylic acid (AHAs and BHAs)

• Chemical peels and some resurfacing treatments

Purging usually appears where you already tend to get spots. Dermatica's consultant dermatologist describes it lasting between two and eight weeks, with improvement usually noticeable from around six weeks[1].

Why PDRN is not expected to cause purging: the evidence

PDRN appears to work differently from exfoliating ingredients[2]:

• It does not loosen dead skin cells or dissolve the "glue" between them.

• It does not push skin cell turnover the way retinoids do. Its proposed actions are activating adenosine A2A receptors, linked to calmer inflammation and repair, and supplying nucleotides that stressed cells can recycle.

• It is non-exfoliating and is often used alongside stronger actives for comfort, although that does not mean it cannot irritate some people. See is PDRN an active.

So there is no known mechanism by which PDRN would bring hidden microcomedones to the surface. No study has specifically looked for purging with PDRN, and other ingredients in the same product, such as oils, fragrance or preservatives, can still cause breakouts or reactions.

When a PDRN product might cause a purge-type flare

If a flare is linked to a PDRN product, the most likely cause is another ingredient in the formula. Check the full ingredient list for:

Retinoids

Some PDRN products also contain a retinoid, such as retinol, retinal or a retinyl ester. The NHS notes that topical retinoids used for acne can cause side effects such as mild irritation and stinging[3]. Any purge-type flare from these products is more likely to come from the retinoid than from PDRN. Read PDRN vs retinol.

Exfoliating acids

PDRN toners, pads and cleansers sometimes contain AHAs, BHAs or PHAs, which speed up shedding and can cause a purge-type flare.

Spicules ("needle shot" products)

Some products contain spicules, tiny needle-like particles that can cause a prickling sensation. Their effect on purging has not been well studied, and they can irritate skin, so stop if soreness, rash or spreading spots develop.

Purge or breakout? How to tell

If the product contains no retinoid or exfoliating acid, treat spots as a breakout or reaction rather than a purge. This table is a rough guide, not a diagnosis.

Pharmacist’s tip: Before deciding it is a purge, check the full ingredient list for retinoids or acids. If there is no exfoliating ingredient, a purge is unlikely, so stop the product.

What to do about spots after a PDRN product

If it is a breakout

• Stop the product.

• Go back to a simple routine for one to two weeks.

• Check the ingredient list for likely triggers such as fragrance or rich oils.

• Consider a lighter, fragrance-free PDRN formula if you want to try again.

If it is a purge from a PDRN plus retinoid or acid product

• Reduce use to two or three nights a week and build up slowly.

• Avoid adding other exfoliants at the same time[1].

• Moisturise well and wear sunscreen daily.

• If the flare lasts beyond eight weeks, is painful or spreads to new areas, stop and speak to a pharmacist or your GP[3].

Can PDRN help you get through a retinoid purge?

Possibly. Because PDRN is soothing and non-exfoliating, a fragrance-free PDRN serum or gel may help skin feel more comfortable while it adjusts to a retinoid. It will not stop a purge, but it may reduce the dryness and stinging that make people give up. Topical retinoids are a recognised acne treatment in UK guidance[3,5], so if one has been recommended for you, ask your pharmacist or GP how to manage side effects. See will PDRN help with acne.

How to start a PDRN product that contains retinol or acids

If you want the convenience of a combined product, a careful start reduces the chance of a strong purge or irritation:

• Check the label so you know exactly which exfoliating ingredient it contains.

• Start low and slow, using it two or three evenings a week for the first two weeks.

• Use one exfoliating product at a time. Pause other retinoids, acids and scrubs.

• Buffer if needed by applying a simple moisturiser first.

• Protect your skin with daily broad-spectrum sunscreen.

• Review at six to eight weeks. If spots are clearly improving, carry on. If not, or if your skin is sore, stop and get advice.

If you are pregnant or trying to conceive, avoid PDRN products that contain retinoids[3].

The bottom line

PDRN is not expected to cause purging, because it is not known to speed up skin cell turnover, but this has not been studied. Spots after a product with no retinoid or acid are more likely a breakout or reaction, and a sign to stop. If your PDRN product also contains a retinoid or exfoliating acid, a temporary purge-type flare is possible and is more likely to come from those ingredients.

FAQs

How long does purging last?

A UK consultant dermatologist describes two to eight weeks, with improvement from around week six[1]. Anything longer deserves a review.

Do spicule ("needle shot") products cause purging?

This has not been well studied. Some people report flaking or spots when starting spicule products. Start slowly and stop if irritation persists.

Can PDRN injections cause purging?

Purging is not the usual term for this. Small bumps after injections are typically where the product sits in the skin and usually settle within a day or two; contact your practitioner if they persist. See are PDRN injections safe.

Should I push through spots from a PDRN serum?

Only if the product contains a retinoid or exfoliant and the spots match the purge pattern. Otherwise, stop it.

Does a PDRN toner with acids cause purging?

It can, because of the acids. Introduce it slowly and avoid using other exfoliants at the same time.

Related reading

• Will PDRN Cause Acne? Why You Might Break Out and What to Do

• PDRN vs Retinol and Other Actives

• Is PDRN an Active Ingredient? What That Really Means

• Will PDRN Help With Acne? What It Can and Can't Do

References

• Engelina S. Retinoids: why skin purges and how long it lasts. Dermatica Skinlab. Accessed October 2026.

• Squadrito F, Bitto A, Irrera N, et al. Pharmacological activity and clinical use of PDRN. Frontiers in Pharmacology. 2017;8:224.

• NHS. Acne: treatment. Accessed October 2026.

• Mukherjee S, Date A, Patravale V, et al. Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety. Clin Interv Aging. 2006;1(4):327–348.

• National Institute for Health and Care Excellence. Acne vulgaris: management (NG198). 2021.

This article is for general information only and is not a substitute for personalised advice from a pharmacist, GP or other qualified healthcare professional. If you have a reaction or a medical concern, seek professional advice.