Hyperpigmentation
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Hyperpigmentation vs Blemish
Hyperpigmentation is a medical word with one meaning: an area of skin holding extra pigment. It is flat, and it is tan, brown or grey. Blemish is a beauty word, and it is loose. Most of the time it means a pimple, and the rest of the time it means any mark at all — so a dark spot is a blemish too, but a fresh pimple is not hyperpigmentation.
At a glance
| The difference | Hyperpigmentation | Blemish |
|---|---|---|
| Can you feel it | No | Usually yes |
| What colour it is | Tan, brown or grey-brown | Red first, brown later |
Blemish
Any mark you would rather not have Not a medical term. Product labels use it for pimples, blackheads, dark spots, scars and general unevenness.
Side by side
The differences that matter
What the word means
Hyperpigmentation
Extra pigment in the skin
It describes a colour, nothing else. Freckles, sun spots, melasma and the brown marks left by acne are all hyperpigmentation.
Blemish
Any mark you would rather not have
Not a medical term. Product labels use it for pimples, blackheads, dark spots, scars and general unevenness.
Can you feel it
Hyperpigmentation
No
Hyperpigmentation is flat. Run a fingertip over it and it feels the same as the skin around it.
Blemish
Usually yes
When people say blemish out loud, they usually mean a raised, inflamed spot they can feel.
What colour it is
Hyperpigmentation
Tan, brown or grey-brown
Pigment sitting deeper in the skin looks greyer. A fresh mark can be pink or red before it settles to brown.
Blemish
Red first, brown later
A pimple is red or pink while it is active. The brown shadow it leaves behind afterwards is hyperpigmentation.
How long it lasts
Hyperpigmentation
Months, sometimes years
Marks left by inflammation fade over three to twelve months. Sun spots do not fade at all.
Blemish
Days to a couple of weeks
An ordinary pimple runs its course in under a week. A deep, painful one takes longer and is more likely to leave a mark.
What makes it worse
Hyperpigmentation
Sun, plus whatever caused it
Ultraviolet light darkens nearly every kind. Spots that keep returning in the same place keep feeding new marks.
Blemish
Picking
Squeezing pushes the contents deeper and makes the inflammation worse. It is the main reason a three-day spot becomes a three-month mark.
What it needs
Hyperpigmentation
Sunscreen, then match the cause
There is no one treatment, because there is no one cause. Naming the kind decides everything that comes after.
Blemish
Treat the acne, not the mark
A fading cream works well on a settled mark. It loses to a spot that keeps coming back in the same place.
What people usually mean when they say blemish
Blemish
Nine times out of ten, a blemish is a pimple. It is the polite word — the one used on packaging, in adverts and by people who would rather not say zit.
Where the two words overlap
Hyperpigmentation
A pimple often turns into hyperpigmentation. The spot heals, and a flat brown mark stays behind where it was. That mark is called post-inflammatory hyperpigmentation, and it is the single most common kind on acne-prone skin.
Why the word matters when you are shopping
Blemish
A "blemish" product is almost always an acne product. Expect salicylic acid, benzoyl peroxide or sulfur. Those clear spots. They do very little to a brown mark that is already there.
See a doctor if
More photographs
Hyperpigmentation
Common questions
Questions Patients Ask
Is a blemish the same as hyperpigmentation?
No. Blemish is a loose beauty word that usually means a pimple. Hyperpigmentation is a medical word for a flat area of skin with extra pigment in it.
Is a dark spot a blemish?
It can be, because "blemish" stretches to cover any mark. But the more useful word for a flat brown spot is hyperpigmentation, since that is what product labels and dermatologists use.
Can a pimple leave hyperpigmentation?
Yes, and it happens often. The flat brown mark left where a spot used to be is called post-inflammatory hyperpigmentation, and it usually fades over three to twelve months.
Why is my blemish cream not fading my dark spots?
Most products labelled for blemishes are acne products. They clear spots but do very little to a brown mark that is already there. Fading marks needs a pigment ingredient instead.
How do I tell an active spot from a mark left behind?
Touch it. An active spot is raised and often tender. A mark left behind is completely flat and does not hurt.
Which fades faster, a mark from a pimple or a sun spot?
The mark from a pimple. Those fade over months on their own. Sun spots do not fade at all and need treatment to clear.