Dermatologist's Guide to Your Best Skin

Acne & Pimples 101: Why We Break Out and How to Handle It Like a Dermatologist

As a double board-certified dermatologic surgeon who has spent two decades examining every version of a bump, blob, pustule, papule, and “what on earth is this?”, I can confidently say: acne is equal parts biology, behavior, and bad timing. Yes, adults get it. Yes, even dermatologists get it. And no, your skin isn’t sabotaging you -  even if it feels like it.

Let’s break down what acne is, what it isn’t, and how to treat it without making things worse.

What Is Acne (and Why Do We Get It)?

Acne vulgaris (its official name, which makes it sound far more dramatic than it is) is a chronic inflammatory condition of the hair follicle and oil gland.

A breakout happens when four things collide:

  1. Excess oil production (hello hormones)
  2. Dead skin cells clogging the pore (hyperkeratinization)
  3. Cutibacterium acnes bacteria thriving inside the clogged pore
  4. Inflammation - the grand finale

When this system misbehaves, you get:

  • Whiteheads
  • Blackheads
  • Red bumps (papules)
  • Pustules (the classic “zit”)
  • Nodules and cysts (the deep, painful “why today?” bumps)

A pimple is one bump while acne is the repeated pattern.

Types of Acne

One of the biggest myths about acne is timing. People assume yesterday’s dessert, sunscreen, or new serum caused today’s breakout.  I wish acne developed that fast - it would make my job dramatically easier. In reality, acne is slow and sneaky.

First: What’s NOT Acne

If you wake up with bumps within 24 hours of trying something new, that’s irritation - not acne.

Irritation bumps are:

  • Small
  • Red
  • Sometimes itchy or burning
  • Never paired with blackheads or whiteheads

True acne takes weeks, not hours.

1. Comedonal Acne

Whiteheads & blackheads

  • Often worsened by heavy skincare or makeup
  • Timeline: Forms over 4 - 6 weeks
    • Requires a full skin cell cycle for oil + dead skin to clog the pore

2. Inflammatory Acne

Red bumps, papules, pustules

  • Inflammation layered on top of a clogged pore
  • Timeline: Develops over 6 - 8+ weeks
    • The “angry” red bump is the final stage, not the beginning

3. Hormonal Acne

Deep, painful cysts along the jawline and chin

  • Common in adults
  • Linked to menstrual cycles, stress, and hormonal shifts
  • Timeline: Cyclic - often every 28 days
    • Hormonal changes stimulate oil glands weeks before the breakout appears

4. Cystic / Nodular Acne

Large, stubborn, painful bumps

  • High risk for scarring
  • Timeline: Forms over 8 -12+ weeks
    • Begins deep below the surface long before you can see or feel it

The Bottom Line

If a bump appears overnight, it’s almost never acne. It’s irritation - and irritation needs calming, not acne treatments.

Skin Conditions That Look Like Acne

Not every bump is acne, and treating the wrong thing can make matters worse.

Irritation (Irritant or Allergic Contact Dermatitis)

If your bumps appear within 24 hours of a new product, sunscreen, or makeup, it's irritation or inflammation - not acne. These bumps are often, red, itchy or burning, rash-like and without blackheads.

Rosacea

  • Red bumps, flushing, burning, sensitivity
  • No comedones, ever
  • Acne treatments (benzoyl peroxide, harsh acids) typically make it worse

Perioral Dermatitis

  • Tiny bumps around the mouth, nose, or eyes
  • Triggered by:
    • Steroid creams
    • Nasal steroid sprays
    • Irritating skincare
    • Fluoridated toothpaste

Folliculitis

  • Inflamed hair follicles from sweat, friction, shaving, or yeast
  • Looks like scattered “little pimples”
  • Often itchy
  • Treated very differently than acne

Staph Infection (Bacterial Folliculitis or Impetigo)

This is not acne, but it’s one of the most commonly misdiagnosed conditions I treat.

Clues it may be staph, not acne:

  • Painful, red bumps that can look like pimples
  • Can have white heads, but they’re tender and angry-looking
  • Sometimes develop honey-yellow crusting (a classic sign of impetigo)
  • Often worsens quickly
  • Can spread to nearby hair follicles

Staph infections need treatment — sometimes topical antibiotics, sometimes oral ones.

Do not pick them or treat them like acne, that can increase spread and delay healing.

Common Acne Triggers

1. Hormones

Puberty, menstrual cycles, stress, pregnancy, stopping birth control.

2. Diet

High-glycemic foods, whey protein, and (for some people) dairy and even milk chocolate.

3. Lifestyle

Sweat, friction, pillowcases, hair oils, makeup, picking. This can also include other products we put on our faces. 

What Your Pimple's Location Says

Chin & Jawline: Hormones, stress, mask rubbing. You’d think that hormonal acne would stop once you’re through puberty, but hormonal chin acne is most often seen in women older than 25 through menopause.

Forehead: Hair products, sweat, makeup.

Cheeks: Phones, pillowcases, rosacea overlap.

Back & Chest: Sweat + friction + tight clothing.

The Best Way to Prevent Breakouts

Keep your pores clear, control inflammation, and support your skin barrier consistently - not just when a breakout appears.

The dermatologist-approved routine:

1. Use a Retinoid at Night

Keeps pores clear and reduces inflammation.

2. Choose Gentle, Non-Pore-Clogging Products

Look for products that are biodegradable, non-irritating, and fragrance-free, like ours:

3. Don’t Over-Treat

More is not better. Consistency is better.

4. Remove Makeup Before Bed

Your pillowcase deserves better.

5. Keep Your Hands Off Your Face

Picking increases inflammation and scarring.

For more details, see "What’s the Best Skincare Routine for Acne-Prone Skin?"

Getting Rid of Pimples Overnight: What Actually Works

Most “overnight acne hacks” are fiction, but a few things do help quickly.

What Works at home

  • Benzoyl peroxide for white heads but too much or too strong can dry out your skin
  • Hydrocolloid patches, Rael is my favorite. 
  • Warm compresses to bring the pimple to the surface

What Doesn’t Work

  • Toothpaste
  • Lemon juice
  • Rubbing alcohol
  • Baking soda
  • Pimple-popping gadgets from TikTok

How to Pop a Pimple (Safely, If You Must)

The only pimple safe to pop is one with a clear whitehead.

Why?

When you squeeze, the contents follow the path of least resistance.

If the top is ready, it comes out.

If it’s not, you push everything deeper - making the pimple bigger, angrier, and longer lasting.

If it has a whitehead

  1. Wash your face and hands
  2. Wrap fingers in tissue
  3. Gently squeeze from the sides
  4. Stop if nothing comes out easily

If it does not have a whitehead. Do. Not. Squeeze.

If it’s deep, painful, or horribly timed

Call your dermatologist - we can help in ways your bathroom mirror cannot.

A dermatologist can:

  • Give a cortisone (Kenalog) injection, a tiny steroid shot that rapidly shrinks inflammation - often within 24 - 48 hours
  • Prescribe a short course of an anti-inflammatory antibiotic like doxycycline

This is the quickest, safest solution for cysts or event-ruining breakouts. If you suffer from widespread acne that heals slowly or leaves scars, please go see a dermatologist. There is so much we can do to get acne under control so you don’t have to live with it now or the scars later. 

FAQ: The Most Common Acne Questions

What causes acne?

Genetics+ inflammation+ oil + clogged pores + bacteria

Why do I still get acne as an adult?

Hormones, stress, cosmetics, and genetics. Completely normal.

Will my acne scar?

Inflammatory lesions - especially cysts - can scar. Early treatment helps.

Why am I breaking out in one specific area?

Often hormones, friction, haircare, or irritation.

Can I pop a pimple?

Only if it has a whitehead.

 

All product recommendations on this site are not sponsored and reflect the independent opinion of Dr. Heather D. Rogers, MD, based on her evidence-based research and extensive clinical experience as a practicing dermatologist. Links are provided for your convenience. Some may include discounts or commissions. Please shop wherever works best for you.

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