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How can I tell blemishes from moles?
You see brown spots in the mirror and are not sure whether they are blemishes or moles, or whether they are the same thing. You may also wonder whether the care and treatment differ depending on the name.
"Blemishes" is an everyday term rather than a formal diagnosis used at the clinic. We first clarify the terms, and then look at when you should have it checked at a visit.
How are blemishes and moles different?
"Blemishes" is usually a general term for small brown spots scattered on the face. Freckles, melasma, and age spots (also called liver spots) may be included.
"Mole" often refers to a brown to black lesion formed by a cluster of pigment-producing cells, and there are flat ones and raised ones. Their causes and course differ, so they are not approached in the same way.
| Category | Blemishes (everyday term) | Mole |
|---|---|---|
| Shape | Often flat, scattered spots | Flat or raised, and often with a relatively distinct border |
| Color | Light brown to brown | Brown to dark brown, black |
| Examples included | Freckles, melasma, age spots, etc. | Pigmented nevus, etc. |
| How to tell apart | Hard to tell by eye alone, so have it checked at a visit | Hard to tell by eye alone, so have it checked at a visit |
What changes mean I should have it checked at a visit?
Most brown spots are simple pigment changes, but some may be other types of lesions, so a check is needed. In the cases below, do not judge or manage it on your own; have it checked at a visit.
These are cases where it is asymmetric on one side or the border is irregular, where the color is uneven or keeps getting darker, where it is growing larger, and where it itches, bleeds, or repeatedly forms a scab. The same applies if a newly appeared lesion changes quickly.
How does the treatment differ?
The approach differs depending on what kind of lesion it is. For a simple pigmented spot, an approach that targets the pigment may be used, and for a raised mole, other methods may be considered. Which method is suitable is decided after checking at the visit.
Trying to remove a mole yourself at home (for example, using removal products) can cause wounds, infection, or scarring, so we do not recommend it.
Frequently asked questions
Q. If a mole is removed, does it come back?
A. What happens after removal depends on the type of lesion and the individual, so it is hard to give one answer for everyone. Please have the lesion checked at a visit and have the possibilities explained to you.
Q. Do blemishes go away on their own over time?
A. It depends on the type. If sun exposure continues, the color may become darker or the number may increase, so consistent use of sunscreen is the basic care.
Q. I have a new mole as an adult. Should I go to the clinic right away?
A. If a newly appeared mole grows quickly or changes in shape or color, we recommend having it checked. Even if there is no change, you can have it checked through a consultation if you are worried.
