What’s that Bump? Common Skin Lesions Explained

Patients often come in worried about a new bump or mark on their skin. Fortunately, many of these lesions are harmless. As a dermatologist, part of my role is not only to treat the skin, but also to help patients understand it. 

Seborrhoeic keratoses (SKs)

Waxy, “stuck-on” brown or black growths that can look alarming but are benign. Common after age 40, sometimes called “senile warts”. 

Treatment: Optional- removal with cryotherapy, curettage, or PlexR®.  Pen if irritating or for cosmetic reasons. 

Dermatofibromas 

Firm, button-like bumps, often on arms or legs, sometimes following an insect bite or minor injury. They dimple when pinched.  usually on thears or legs. They are thought to arise following an insect bite or minor injury although in most patients there is history of this. They dimple when pinched. 

Treatment: Usually not needed; surgical removal if bothersome. necessary but can be removed surgically.

Cherry Angiomas

Small, red spots made up of blood vessels, often on the torso with age. 

Treatment: Removal with pulsed dye laser or electrocautery.  

Milia

Tiny white cysts, usually around the eyes or cheeks.  

Treatment: Simple extraction with a fine sterile needle in clinic. 

Epidermoid cysts

Smooth lumps under the skin, often with a central pore, common on the back, neck or face. 

Treatment: Excision under local anaesthetic if inflamed or uncomfortable.

When to See a Dermatologist

If you notice a bump that changes in size, shape, or colour, or it bleeds or becomes painful, book a skin check. Early diagnosis is key for suspicious lesions, including skin cancers.