Understanding cryotherapy for skin lesions
Freezing damages the targeted tissue, which then separates as the skin heals. It is quick, needs no injections in most cases, and suits several common benign lesions.
Depth and duration of freezing are controlled by the doctor. Too little does not clear the lesion; too much increases the risk of pigment change or scarring, which matters especially in deeper skin tones.
Not every lesion suits cryotherapy. The choice between freezing, cautery and excision is made after examination.
This may suit you if
- Viral warts on the hands or feet
- Seborrhoeic keratoses and other benign growths
- Selected small lesions where freezing is appropriate
What happens at the clinic
- 1
Diagnosis
Lesions are examined to confirm they are benign and suitable for freezing.
- 2
Application
Liquid nitrogen is applied for a controlled duration. A stinging sensation is felt during and shortly after.
- 3
Blister and healing
A blister or scab may form within a day and separates over one to two weeks.
- 4
Review
Response is reviewed and repeat freezing is scheduled if the lesion persists.
Aftercare
- Keep the treated area clean and dry as instructed
- Apply the prescribed ointment and dressing until healed
- Do not pick or scratch scabs
- Use sun protection on the healed area to reduce marking
- Do not burst blisters — cover them and let them settle
Possible side effects
- Blistering, sometimes with blood in the blister
- Pigment change — lightening or darkening — particularly in deeper skin tones
- Discomfort for a day or two after treatment
- Incomplete clearance requiring repeat sessions