General dermatology

Seborrhoeic keratosis

Seborrhoeic keratosis is a very common benign lesion from the age of 40 onwards. It looks like a flat wart “stuck on” the skin, light to dark brown with a rough surface. It usually appears on the trunk, face and neck.

Is it dangerous?

No. It does not turn into cancer and is not contagious. However, some look similar to other pigmented lesions, so it is important to have them assessed by a dermatologist, usually with dermoscopy.

How is it removed?

If it is bothersome, rubs against clothing or for cosmetic reasons, it can be removed quickly in the clinic with cryotherapy, electrocoagulation, curettage or laser, depending on its location and size.

When to see a dermatologist

When a new lesion grows quickly, changes or bleeds, or if you are unsure what kind of lesion it is.

This information does not replace a medical consultation and is not intended to encourage self-diagnosis.