Skin Blemishes: Types, Causes, and Treatment Approaches

What are skin blemishes?

“"Skin spots" are not a single disease. The brown, gray, red, or light-colored areas that patients describe as spots may be indicative of various dermatological conditions.

The groups we encounter most frequently are:

Melasma

Sunspots (solar lentigomas)

Dark spots after acne or inflammation (post-inflammatory hyperpigmentation (PIH))

Ciller

Diseases that cause pigment loss, such as vitiligo.

Rarer pigment disorders

Therefore, the first step in treatment is not trying to erase the stain, but identifying what the stain is.

Why does the type of stain matter?

Because two brown spots that look the same can have completely different treatments.

Melasma is chronic and prone to recurrence; photoprotection and topical treatments play a key role.

Solar lentigines are associated with chronic sun exposure and appear as more localized lesions. A recent systematic review evaluated options such as topical treatments, cryotherapy, intense pulsed light (IPL), and various laser systems; however, it was found that no single method was superior for every patient, and the risk of PID varied among the methods.

Post-inflammatory hyperpigmentation occurs after acne, eczema, irritation, or other inflammation. Controlling the underlying inflammation and preventing new pigmentation is crucial in this case.

Are sunspots and melasma the same thing?

No.

Solar lentigo typically presents as more localized, sharply demarcated brown lesions and is associated with chronic UV exposure.

Melasma, on the other hand, is a larger, irregularly bordered, and often symmetrical facial pigmentation.

This distinction is important because a local treatment approach that might be suitable for solar lentigo could lead to undesirable results if applied in the same way to melasma.

Does laser treatment remove all blemishes?

No.

“"A lesion" is not an indication for laser treatment; diagnosis is required first.

For example, there are clinical studies supporting the effectiveness of various physical methods, including laser and IPL, in solar lentigines. A 2025 systematic review evaluated 41 clinical studies. However, the effectiveness of the methods and the risk of post-inflammatory pigmentation differ.

Furthermore, the development of PIH after laser treatment is a significant problem, especially in individuals prone to pigmentation; the 2024 randomized study further evaluated this risk after 532 nm Q-switched Nd:YAG treatment.

correct stain,

the right patient,

the right technology,

correct parameter

They should be evaluated together.

How are skin blemishes evaluated?

During a dermatological examination:

the color of the stain,

borders,

distribution,

how long he/she has been there,

its relationship with the sun,

whether there was inflammation beforehand,

products used and processes performed

It is evaluated.

Dermoscopy or other辅助 methods may be used if necessary.

When should you consult a dermatologist?

Especially:

newly emerging,

rapidly changing,

single and irregularly shaped,

bleeding or crusting,

darkened by previous treatment

Evaluation of pigmented lesions is important.

Because not every blemish that a patient describes is a cosmetic pigmentation problem.

How is treatment chosen?

Treatment varies depending on the diagnosis.

Melasma → photoprotection + appropriate topical/medical treatment ± selected procedures Solar lentigo → appropriate topical or local physical therapies PIH → inflammation control + pigment treatment + photoprotection Freckles → evaluation according to patient expectations Suspected pigmented lesion → diagnosis first; not a cosmetic procedure

Frequently Asked Questions

Are all brown spots sunspots? No.

Does blemish cream work on all blemishes? No. Treatment varies depending on the type of blemish.

Can spots darken after laser treatment? Yes. This risk exists, especially in individuals prone to post-inflammatory hyperpigmentation.

Do sunspots recur? Treated lesions may diminish or disappear; however, continued sun exposure can contribute to the formation of new solar lentigines.

How to differentiate between melasma and sunspots? The distribution, boundaries, clinical appearance, and history are different; a definitive distinction is made through dermatological evaluation.