What to expect from cryotherapy for actinic keratosis

An actinic keratosis is a sun-damaged rough or scaly patch. During cryotherapy, the clinician applies a very cold agent to the selected lesion and a small margin around it. You may feel a sharp cold sensation followed by stinging or burning. The treated area can become red and swollen, then form a blister or dark crust.

The crust separates as new skin forms underneath. Healing differs by body site, lesion thickness, and the depth of freezing. The area may be lighter or darker afterwards, and a persistent rough patch may need reassessment rather than repeated self-treatment. Cryotherapy treats the chosen lesion; it does not remove sun damage from other skin.

Keep the site clean and follow the clinician's dressing instructions. If a blister forms, do not deliberately puncture or peel it unless you receive specific medical advice. Protect the area from friction, picking, and unapproved creams. If the dressing becomes wet or dirty, change it using the method provided by the clinic.

Once the skin has healed, use sun-protective clothing and sunscreen as advised, and arrange skin checks when recommended. Tell the clinician if the patch does not heal, remains tender, thickens, or changes character. A lesion that was not correctly identified may require another examination or a different treatment.

Contact the clinic if pain, warmth, swelling, redness, or drainage is worsening, or if pus, fever, spreading redness, or a bad smell develops. Seek prompt review if bleeding will not stop with firm pressure or if the wound is not healing as expected. Urgent care is appropriate for severe bleeding, rapidly spreading redness, or feeling seriously unwell.

Ask whether the patch is suitable for cryotherapy, what depth of freezing is planned, how to dress a blister, and when the site should be checked. Clarify what healing changes are expected, how to protect nearby skin, and which persistent or changing features could require further assessment.