How effective is cryotherapy for seborrheic keratosis?

Seborrheic keratoses are usually rough, scaly, or waxy growths that can look as if they sit on top of the skin. Cryotherapy freezes a selected growth so the treated tissue dries and sheds during healing. A thin lesion may respond more readily than a thick or deeply pigmented one. The area can blister, crust, or temporarily change colour, and the final appearance develops as the skin repairs. Because a changing growth can resemble a skin cancer, a clinician should confirm the diagnosis before cosmetic removal.

Arrange an examination if the growth is new, changing, bleeding, persistently itchy, or unlike your other lesions. If cryotherapy is chosen, ask how to clean and cover the site and whether you should use a prescribed ointment. Leave the crust in place, protect healing skin from sun exposure, and tell the clinician about previous problems with pigment changes or raised scars. A thick lesion may be better assessed for shaving or another procedure.

Seek review for increasing pain, spreading redness, warmth, pus, or fever after treatment. Contact the clinic if bleeding continues despite gentle pressure or if the wound is slow to heal. Prompt reassessment is needed when the growth changes, returns, or remains uncertain after removal, because cryotherapy does not provide a specimen for laboratory examination.

How confident are you that this is a seborrheic keratosis? Is freezing appropriate for its thickness and colour? What pigment change or scarring might occur with my skin type, and would another technique allow tissue testing?