Cryosurgery uses extreme cold — liquid nitrogen at −196°C — to freeze and destroy abnormal scar tissue. It is a well-established technique used across a range of skin conditions, and one of the more effective options for raised scars.
How it works
Liquid nitrogen is applied through a cryogun, causing a controlled frostbite in the scar. The frozen tissue swells and dies, and over the following weeks the body sheds it and replaces it with flatter, smoother skin.
For most keloids Dr Buckley now uses intralesional cryosurgery, which freezes the scar from the inside out and concentrates the effect where the scar tissue actually is.
Why it is used
- Minimally invasive — no cutting, no stitches
- Quick, often finished in a few minutes
- Effective on keloids that have returned after other treatments
- Can be combined with other treatments for a better result
Experience
Dr Buckley is internationally recognised for his expertise in cryosurgery. He is a member of the International Society of Cryosurgery, the American College of Cryosurgery and the European Academy of Dermatology and Venereology, has contributed chapters to two international textbooks on cryosurgery, and has taught the technique internationally.
Common questions
Is it painful?
Local anaesthetic is injected into the keloid first, so discomfort during treatment is minimal. Most people describe a brief cold sensation.
What does healing look like?
The scar swells, blisters and weeps for the first few weeks. At around four to six weeks it goes black, dries and falls off. Full aftercare guidance is on the patient information page.
How many treatments will I need?
It depends on the size and type of the scar. Most small keloids clear in one or two sessions. Larger keloids need more.
Are the results permanent?
Cryosurgery can reduce the appearance of a scar permanently, though some keloids need further sessions or a combined approach.