The precautions to be taken after skin cryotherapy include keeping the wound clean, avoiding irritation, daily sun protection and reasonable diet. 1. Keep the wound clean, avoid stimulation: after skin cryotherapy, patients need to pay attention to the cleanliness and dryness of the wound, avoid scratching and stimulation, if there is a breakage, you need to disinfect the wound with iodine povidone every day, apply erythromycin ointment and so on to prevent secondary infection. 2. Daily sunscreen: pay attention to sunscreen when you go out, such as wearing sunscreen clothing, sun hat, sun glasses, etc., to avoid the phenomenon of aggravation of local hyperpigmentation. 3. Reasonable diet: patients need to eat three regular meals, diet should be light, drink more water, eat more fresh vegetables and fruits, supplement protein, vitamins and trace elements, conducive to the recovery of tissues, eat less spicy and stimulating food, to prevent poor wound healing. After skin cryotherapy, patients should closely monitor the recovery of the skin wounds, if there are breakouts, acute suppurative infections, etc., they need to go to the hospital in time.