Seborrheic keratosis is a common, harmless, noncancerous growth on the skin. The usually shows up as a pale, black, or brown development on the back, shoulders, chest, or face.

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The plural of keratosis is keratoses. Seborrheic keratoses are additionally known as basal cabinet papilloma, or seborrheic warts.

Seborrheic keratoses have tendency to show up from middle-age onwards. Some people may have actually just one, however normally there will certainly be several. Seborrheic keratosis is not contagious.

Thirty percent of people have at the very least one through the age of 40 years, and they affect over 75 percent of world by the period of 70 years.

" class="css-1lwg88w"/>Share ~ above PinterestSeborrheic keratosis is a common type of pigmented skin patch.
Seborrheic keratoses might look favor warts, moles, or skin cancer. Your appearance is waxy, and they look together if they space stuck ~ above the skin. Some may look favor a blob the brown candle wax.

Others resemble barnacles.

They can selection in dimension from tiny to over 1 customs across.

They space not painful, but they might itch or come to be irritated. Over there are 4 dimensions to take into consideration when relenten seborrheic keratosis:

Location: The growths room most typically found on the scalp, shoulder, chest, abdomen, or back. They space never found on the soles the the feet or palms that the hands.Texture: Lesions usually start off as small, turbulent bumps, and also they gradually get thicker and also develop a warty surface. They deserve to sometimes show up waxy and “stuck on.”Shape: They are usually round or oval.Color: most are brown, but they can be yellow, black, or white.

The lesions are rarely painful, yet they have the right to be annoying, depending upon their position. The is necessary not to choose or scrape them together this have the right to lead to bleeding, swelling, and, potentially, infection.

When come visit a doctor

If the complying with occur, a doctor’s opinion should be sought:

a large number of growths thrive in a short room of timethe borders around the growths room irregular or blurredthe growths space irritated by clothes and regularly bleed, removal might be an optiongrowths or sores develop and also do no healif the growths room an inexplicable color; because that instance, purple, reddish-black, or blue

In most instances of seborrheic keratosis, no further treatment is necessary.

The doctor may recommend removed the expansion if:

it is difficult to distinguish from skin cancer, or if the diagnosis is uncertainthe patience does not choose it, and also wants the removedit causes problems, for example, itching or irritation with garments or jewelry rubbing against it

If the dermatologist carries the end a biopsy, castle will generally remove the seborrheic keratosis in ~ the exact same time.

There are several methods of remove seborrheic keratosis.


Liquid nitrogen is applied to the growth with a spray gun or cotton swab. The lesion freezes and falls off in a couple of days. A blister may form when the development falls off; this will ultimately dry into a crust, i beg your pardon will fall off.

Electrocautery, curettage, or both

In electrocautery, additionally known together electrosurgery, the surgeon supplies an electric present to burn (cauterize) the growth, under a neighborhood anesthetic. In curettage, a curette – a scoop-shaped operation instrument – is supplied to scrape turn off the burned growth.

Some patients might require just electrocautery, some curettage, and also others both.


Ablation involves vaporizing the expansion with a laser.

All the methods of removal above have disadvantages. For example, the skin in the area that the seborrheic keratoses may be lighter, and also therefore leaving a lighter mark where the lesion as soon as was. Also, there is no means to eliminate multiple lesions in a single intervention.

In many cases, the growth does not return, but brand-new ones may appear in other locations of the body.

Dermatologists room not specific why seborrheic keratoses develop.

Possible causes and risk components include:

Sunlight: Lesions commonly appear on components of the body that are much more exposed to sunlight. Ultraviolet (UV) light might play a role. However, lock can construct in locations rarely exposed come sunlight, so this is not the totality answer.Age: castle are much more likely to develop in those aged 50 year or above.

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The growths have been discovered to feature specific gene mutations comparable to those in ovarian cancer and also multiple myeloma, however scientists speak they have actually “virtually no malignant potential.”

Seborrheic keratoses room not thought to be associated to any type of viral infection. Skin friction might be a factor, as they often show up in skin folds.