Hyperpigmentation

Hyperpigmentation is a catch-all term for darker spots or patches on the skin. It happens when skin makes too much melanin, the natural pigment that gives skin its color.

The dark spots are flat, not raised, and do not usually hurt or itch. They are a color change, not a growth or a rash. Hyperpigmentation is harmless on its own.

It is most common on sun-exposed areas like the face, neck, chest, and backs of the hands. Fading it takes time and steady sun protection.

The main sign is flat patches of skin that are darker than your normal skin tone. The color can be light brown, tan, dark brown, or grayish. The spots have no bumps or texture change. They often appear on sun-exposed areas or where the skin was recently injured or broke out.

• Post-inflammatory hyperpigmentation (PIH): Dark marks after acne, a rash, or injury.
• Sun spots / age spots (solar lentigines): From years of sun.
• Melasma: Larger patches tied to hormones and sun.
• Freckles: Small tan spots that darken with sun.

• Sun exposure: The biggest cause.
• Inflammation: After irritation, skin can leave a dark mark (post-inflammatory hyperpigmentation). Acne is a common cause.
• Hormones: Pregnancy or birth control pills can trigger dark patches (the usual driver behind melasma).
• Injury: Cuts, burns, bug bites, and picking can leave a dark mark.

• Sun: The number one trigger.
• Picking or scratching: Causes inflammation and more dark marks.
• Heat: Can worsen some pigmentation, especially melasma.

Most cases are diagnosed by a simple visual exam. A Wood's lamp can show how deep the pigment sits. A biopsy is rarely needed, only if a spot looks unusual or to rule out skin cancer.

Sunscreen comes first. Without it, spots keep coming back. Use broad-spectrum SPF 30 or higher every day.

Over-the-counter ingredients that help fade spots over time:

• Vitamin C — brightens and lightens spots.
• Niacinamide — slows pigment spread and evens tone.
• Azelaic acid — fades spots and calms inflammation.
• Retinol — speeds cell turnover.

The key is patience — fading usually takes several weeks to a few months.

Look for products that combine daily sun protection with a proven brightening ingredient. A broad-spectrum SPF 30+ is the base. From there, choose a serum with vitamin C, niacinamide, azelaic acid, or a retinoid. Start slow to avoid irritation, since irritation can lead to more dark marks.

For stubborn spots, a dermatologist can prescribe:

• Hydroquinone: A skin-lightening cream for short-term use.
• Tretinoin: Boosts turnover and helps fade pigment.
• Azelaic acid: In higher prescription strengths.
• Triple-combination cream: Hydroquinone, a retinoid, and a mild steroid — very effective, especially for melasma.

Chemical peels use acids to remove the top layers of skin and lift pigment. Lasers can also target dark spots. Both work best in lighter skin; in darker skin tones they carry a higher risk of causing more pigmentation, so they should be done carefully.

See a dermatologist if your dark spots are not fading after a few months, are spreading, or new spots keep appearing. Also see a doctor for any spot that changes in size, shape, or color, to rule out skin cancer.

• Melasma: Larger facial patches tied to hormones.
• Freckles: Small, often inherited tan spots.
• Skin cancer: A spot that is changing, growing, or has uneven edges should be checked.