The process of common warts falling off after cryotherapy

Cryotherapy is a commonly used treatment for common warts, involving the application of liquid nitrogen at -196°C. Clinically, it is used for localized treatment to cause necrosis and shedding of affected tissue, thereby achieving therapeutic goals. The process of wart detachment after cryotherapy is as follows:

1. Soak the affected area in warm water until the skin's keratinized layer softens.

2. The doctor scrapes off the superficial keratinized layer of the wart using a blunt blade.

3. Place a cotton ball under the affected area and apply pressurized liquid nitrogen to freeze the wart. Freeze until the wart turns white. If necessary, use medical instruments to remove the hard core of the wart and apply medication.

4. After treatment, cover the treated area with a dressing to protect the wound.

5. Within approximately 4–10 days, a slightly hardened scab will form at the frozen site. It generally takes 10 days to half a month for the scab to fall off naturally. Note that individual healing times may vary.

6. After the scab falls off, check whether any residual material remains. If any discharge or debris remains uncleansed, further cryotherapy at a hospital is required.

After cryotherapy, some patients may develop blood blisters within 24 hours. If the blister is small, no treatment is needed. However, if the blood blister is large and difficult to absorb naturally, disinfect the area locally with iodophor and drain the fluid using a sterile syringe. Take care not to tear the blister wall, as it provides protective coverage for the wound. It is recommended to seek treatment at a qualified medical facility and follow the guidance of a professional physician.