Cryotherapy treats actinic keratoses (AKs), or pre-cancerous lesions, by submerging them in liquid nitrogen. This cold or freezing therapy targets the mutated skin cells of AKs, triggering the body to slough them off. Beneath, new, healthy skin cells generate, and you’ve prevented a pre-cancerous lesion from developing into skin cancer down the road. For ongoing skin cancer prevention, we always recommend a strict daily sun protection regimen.