Uneven skin tone and pigmentation: what causes it

Pigmentation Issues

Pigmentation issues include dark spots, melasma, and uneven tone. These changes are often triggered by sun exposure, hormones, or inflammation. Identifying the cause is key to understanding why your skin looks blotchy or discolored.

Frustrated by dark spots that linger?

Uneven skin tone isn’t just cosmetic. It can feel like a reminder every time you look in the mirror. Maybe it’s melasma from hormones. Maybe it’s sun spots from years outside, or marks left behind by old breakouts. Whatever started it, the pigmentation often sticks around long after the cause is gone. Many people try brightening creams or home remedies first, and when those don’t work, the frustration builds.

Stubborn dark spots or blotchy patches that makeup can’t fully cover
Pigmentation that keeps coming back, even with sunscreen and brightening products
Feeling self-conscious about uneven skin tone at work or with friends

Tap to Schedule an AppointmentTap to Call Us

Understanding the causes of uneven skin tone

Why Pigmentation Happens

How melanin protects and darkens skin

Your skin color comes from melanin, a pigment made by cells called melanocytes. Melanin works like a natural shield. It absorbs UV radiation and neutralizes free radicals, protecting the deeper layers of your skin. When you’re out in the sun, your skin kicks that defense into gear. It makes more melanin in three distinct stages: immediate pigment darkening, persistent pigment darkening, and delayed tanning.

The role of UV exposure

Ultraviolet light is the biggest trigger of pigmentation changes. UVA rays darken existing melanin right away. UVB rays go further and trigger new melanin production, through DNA-damage pathways involving p53 and other molecular signals. That’s why tanning, sun spots and freckles show up after time in the sun, especially without consistent protection.

Hormones, inflammation, and medications

Not all pigmentation comes from the sun. The American Academy of Dermatology (AAD) points to other common causes too. Hormonal shifts like pregnancy or contraceptives, chronic inflammation from acne or eczema, and certain medications can all play a part. These factors over-activate your melanocytes, which can lead to melasma or post-inflammatory hyperpigmentation.

Summary: Key Pigmentation Triggers

Sunlight (UVA & UVB): main cause of increased melanin production
Hormonal changes: pregnancy, contraceptive use
Inflammation: acne, skin injury, irritation
Medications: certain drugs that sensitize or overstimulate pigment cells

Pigmentation Type	Common Cause	Typical Appearance	Reference
Sunspots / Age Spots (Lentigines)	UV exposure (UVA/UVB)	Flat brown patches on sun-exposed skin	[1][2]
Melasma	Hormonal shifts, UV light	Symmetrical brown/gray patches, often on face	[3]
Post-inflammatory Hyperpigmentation (PIH)	Acne, injury, irritation	Dark marks where skin healed from inflammation	[3]
Freckles (Ephelides)	Genetic tendency, sun exposure	Small brown spots, more visible in summer	[4]

Clinically Supported Skin Solutions

Professional facials with brightening agents

Targeted facials can reduce dark spots and even out your tone. They work by exfoliating surface pigment and calming overactive melanocytes. A 12-week study found real improvement in hyperpigmentation and dark spot intensity, with high patient satisfaction across a range of skin types [1]. Kim will match you with one of her facial treatments in Edmonton for dark spots and uneven tone.

Microneedling to improve texture and tone

Microneedling creates tiny, controlled injuries in the skin. That stimulates collagen and helps brightening products absorb better. Studies show it improves outcomes for melasma and post-inflammatory hyperpigmentation, known as PIH, leaving skin smoother and tone more even [2].

LED Light Therapy

Red and yellow LED light reduce oxidative stress and calm the inflammation that fuels pigment imbalance. While most research is in acne and redness, emerging evidence shows promise for fading post-inflammatory pigmentation by supporting skin repair pathways.

Cold laser therapy

Low-level Nd:YAG lasers send energy straight to the cells holding pigment, while leaving the skin around them alone. Research shows this can meaningfully lighten melasma and hyperpigmentation, with very little downtime. One 2025 trial confirmed the safety and effectiveness of multipulse, low-fluence Nd:YAG modes [3].

Chemical peels for cell renewal

Peels made with glycolic, salicylic or TCA acid lift away pigmented cells and block tyrosinase, the enzyme behind melanin production. A 12-week glycolic peel study reported a 36% reduction in hyperpigmentation scores. Dermatologists often pair peels with hydroquinone or retinoids for stronger results [4].

Microdermabrasion for surface pigment

Diamond-tip exfoliation helps shed the outer layer of pigmented skin cells. Paired with brightening serums, biweekly sessions significantly reduced melasma severity and improved overall tone in a recent 2024 study [3].

Hyperpigmentation responds to both surface-level exfoliation, like peels and microdermabrasion, and energy-based therapies, like lasers and LED.

The best results usually come from combining a few of these approaches, matched to your particular type of pigmentation.

Ready to reduce dark spots and restore balance to your skin?

Tap to Schedule an Appointment

Learn more about our Skin Care Clinic and how we support long-term healing.

What Clients Say About Kim

4.8

on Google

5.0

on Facebook

The cold laser therapy met, and blew away all of my expectations.
awesome manscaping to keep me pretty
I walked out feeling better than I have in years honestly
I was well cared for in a professional, caring manner.
my skin looks years younger
Great facials with experience and personal care!
My skin looks and feels so much better!
I have been seeing kim for years and I appreciate her expert advice

Pigmentation questions, answered

If you’ve noticed dark spots or uneven tone, you’re not alone. Here are straight answers to the most common questions about pigmentation changes.

Tap to ask your question

What causes skin pigmentation issues?

Pigmentation happens when your skin makes extra melanin, the pigment that gives skin its color. The common triggers are UV exposure, hormonal shifts, skin inflammation and certain medications. UV light is the biggest one. It activates your melanocytes to make more pigment, which often makes existing spots worse.

Sun exposure and UV damage
Hormonal changes (pregnancy, contraceptives)
Post-acne or eczema inflammation
Medication side effects

Why am I suddenly getting pigmentation?

Sudden pigmentation often shows up when something new triggers it: more sun exposure, a hormonal shift, or recent skin irritation. Your skin responds with extra melanin. You might notice patches, spots or uneven tone. It shows up most on areas that get a lot of sun, like your face, chest and hands.

Can pigmentation go away on its own?

Some pigmentation fades on its own. Post-inflammatory marks from acne, for example, often lighten gradually over months. Melasma and age spots tend to stick around unless you treat them. Daily SPF and good barrier care can help keep spots from getting worse or coming back.