Do Pores Open and Close? No, Here's What They Actually Do

Heads up: this post has affiliate links. We may earn a small commission if you buy something, at no extra cost to you. We only link to stuff we'd actually tell a friend about. Prices shown are approximate and change often; check the retailer for current pricing.

One of the most persistent skincare myths. Here’s what’s actually happening.

Pore anatomy

What pore size depends on:

• Genetics (the main factor, can’t change)
• Sebum production (more oil = appear larger)
• Collagen around pore (less collagen = pore sags)
• Clogs inside pore (sebum + dead cells = visibly larger)

What actually reduces pore appearance

The three-pronged approach:

Premium

Paula's Choice

2% BHA Liquid Exfoliant

Under $50

Unclogs pores from the inside.

Best for: Visible pore reduction

"The pore standard."

Check price on Amazon →

Best value

The Ordinary

Niacinamide 10% + Zinc 1%

Under $25

Reduces sebum production.

Best for: Daily pore control

"The cheapest most-impactful under $25 for oily skin."

Check price on Amazon →

Differin

Adapalene Gel 0.1%

Under $25

Builds collagen around pores + prevents clogs.

Best for: Long-term pore improvement

"under $25 OTC retinoid."

Check price on Amazon →

Myths to ignore

• ❌ “Steam opens pores” (heat doesn’t change pore size)
• ❌ “Cold water closes pores” (nope)
• ❌ “Ice before makeup shrinks pores” (temporary constriction of surrounding tissue only)
• ❌ “Egg white masks tighten pores” (temporary surface tightening, not pore size)