The fact that the warts have not fallen off after 18 days of freezing removal may be related to factors such as surgical failure, improper postoperative care, and the condition of the warts. 1. Surgical failure: If the surgery fails, it may lead to the local warts can not be removed, so that the situation of freezing warts after 18 days has not come off. 2. Improper postoperative care: If the postoperative care is not proper, such as scratching the affected area, daily not sunscreen, etc., it may lead to the freezing of warts after 18 days has not come off. 3. Wart condition: If the warts themselves are large and deep, it may take several treatments to make the warts fall off. There are a lot of reasons why the warts have not come off after 18 days of freezing, so it is recommended that the patient seek medical examination to clarify the reasons.