Enlarged pores: the thinnest evidence base on this site

A pore is not damage

The opening of a hair follicle and its oil gland. Everyone has them, in a number set at birth, and they do not close.

That single fact settles most of the marketing in this category. Nothing "shrinks pores permanently", because there is no defect to repair. What treatment can do is make them less visible — by reducing the sebum filling them, by tightening the skin that holds them open, or by improving the texture around them.

Less visible, while you keep treating. That is the realistic goal, and a clinic that offers more is offering something the literature does not contain.

How thin the evidence actually is

This page exists partly to say a number out loud.

A 2023 review searched the published clinical trials on facial pores and found nineteen studies covering 591 patients in total — aged 18 to 80, 83.7% female. That is the entire clinical literature, across oral isotretinoin, topical retinoic acid, antiandrogen therapy, botulinum toxin, chemical peels, several laser wavelengths, radiofrequency and ultrasound combined.

Fewer than 600 people, across every treatment anyone offers you. For comparison, a single melasma meta-analysis on this site pooled 1,058 patients from 52 trials for one condition.

None of this means the treatments do nothing. It means nobody can tell you how much they will do for you, and any clinic quoting a specific percentage for pore reduction is quoting something other than this literature.

The gap in the device most often proposed

In South Korea, microneedle radiofrequency is what you will usually be offered for pores.

The best available review of that device — 41 studies, over 1,000 patients, published 2026 — covers atrophic acne scars, skin laxity, wrinkles, photoaging, periorbital wrinkles, acne, rosacea, striae, melasma and hyperhidrosis. Enlarged pores are named in its introduction as an indication, and no pore-specific outcome is reported anywhere in the results.

That is not evidence it fails. It is evidence that the thing being sold to you has not been measured for the thing you are buying it for. The device works on the skin around the pore, which is a plausible mechanism — and plausible is a lower standard than measured.

What the review does support

Three practical conclusions, and they are more useful than a device name.

Combination and repetition. The reviewers' conclusion is that multiple sessions and combination therapies improve pore area and number. One session of one thing is not the shape of a result here.

Your age changes the target. In younger patients the driver is usually sebum production, so the plan should be aimed there — the review lists oral isotretinoin, topical retinoic acid and antiandrogen therapy among the options. In older patients the surrounding skin has lost support, so rejuvenation is added to sebum control rather than replacing it.

Side effects are minor. Across the trials, mild and reversible burning and redness were the common complaints.

On botulinum toxin specifically, a 2025 split-face randomised trial in 30 people found intradermal injection and microneedling-assisted delivery both improved pore appearance with no significant difference between routes — at one month. A signal, not a settled answer.

How to buy this sensibly

Pores are the category where an international patient is most likely to be sold a large package on the least evidence. Some ways to protect yourself:

• Ask what the mechanism is for your case — sebum, laxity, or texture. The answer should match your age and skin.
• Ask what happens when you stop. If the mechanism is sebum control, the answer is that pores return.
• Do not accept a percentage. No one can source it.
• Prefer a short course you can judge over a bundled package bought before any result.
• If you have acne scars or texture as well, treat those as the primary target — they have real evidence, and pore appearance often improves alongside.

What to ask at a consultation

• Is my pore appearance driven by oil, by laxity, or by texture?
• What exactly is this device or product doing to that?
• How many sessions, at what interval, and what is the total?
• What do I use at home, and what happens if I stop?
• What is the device's Korean product name?

The bottom line

Pores are follicle openings and cannot be closed; treatment makes them less visible while it continues. The entire clinical literature is nineteen trials and 591 patients across every modality combined, and the 41-study review of the device most often sold for pores in South Korea reports no pore outcome at all. What the evidence does support is combination treatment over multiple sessions, aimed at sebum in younger patients and at the surrounding skin in older ones. Buy a short course you can judge, not a package.