Skin Tags

Skin Tags are the smooth skin skin appendages that is mostly sessile/sitting, occasionally is pedenculated/elongated.

Skin Tags

Skin Tags is a very common occurrence in the elderly.

Skin Tags is known medically as Seborrheic keratosis, also known as seborrheic verruca or senile wart.



Skin Tags

Skin Tags: Seborrheic Keratosis on the Back, a Non Exposed Area to UV Ray.


This is a benign lesion originated in keratinocyte. They are mostly seen in the middle age onward but is also not infrequent to find in the young people even the non-exposed body part. Therefore, the name senile wart is a misnomer.

Skin Tags: Color

Skin Tags are mostly skin colored. At time it is more intense in coloration.

Many colors type such as from light tan to black. They are oval or round shape, flat or only slightly elevated, looks like a scab. The size range from a very small to 2.5 cm. They often come with other skin condition such as the basal cell carcinoma. Since only top layer of epidermis is involved, the lesion gives a pasted on appearance.

Skin Tags: Causes

Skin Tags might be due to UV rays but not conclusive in the study.

Is not known exactly. Some suspect due to UV radiation but the lesion is also found extensively in covered body parts.

Most of the layman think that it is not caused by virus, but it is not.



Skin Tags

Skin Tags: Seborrheic Keratosis on the Temple BEFORE Laser Removal.

Skin Tags

Skin Tags: Seborrheic Keratosis on the Temple AFTER Laser Removal.












Table showing the comparative differences of the actinic keratosis and the seborrheic keratosis.

Actinic keratosis Seborrheic keratosis
Other names Senile keratosis, solar keratosis Seborrheic verruca, senile wart
Tumour characteristic

Associated cancer


Squamous cell carcinoma


Basal cell carcinoma

Location Only exposed skin part All location
Cell origin keratinocyte keratinocyte
Causes UV radiation Unknown, non-viral

Likely somatic mutation in FGFR3 gene

Texture Sandpaper feel, dry rough Smooth
Size Mostly 2-6mm. But can reach few cm Very small – 2.5cm
Appearance Thick, scally, crusty Pasted-on, scab-like appearance
Colour Light tan to dark, pink , red Light tan to dark
Symptom Mostly asymptomatic. Tender, itchy, burning or itching and bleeding Asymptomatic except for aesthetic reason
Salient features Always rough surface Always very smooth surface
Others Untreated lesion has 20% chance of progressing to cancer Never progress to cancer.

Skin Tags: Incidence

Skin Tags occrs how frequently?

This is common in light skin, not so much in darker skinned. This is mostly seen in the middle aged and above. But also frequently in the younger population.

Skin Tags: Diagnosis

Skin Tags is diagnosed in what way?

Stuck or pasted-on appearance.

The gold standard is HPE when doubtful.

Skin Tags: Treatment

Skin Tags is treated in what manner?

No treatment is needed except for aesthetic reason.

It can be done by electrocautery, shave excision, or cryosurgery using liquid nitrogen.