There are more methods to remove the injected substance, including excision, aspiration, scraping and flushing. Before treatment, the surgeon needs to develop a treatment plan based on the results of the facial examination and MRI. If the examination results show that the injections are distributed in a mass and the injected substance is relatively single, aspiration can be adopted with less damage; if the injections are mobile, aspiration may be adopted with less damage and obvious results; if the injections are distributed in a dotted pattern and the range is relatively large, individualized treatment plans are needed. The possible risks of injection removal are as follows: 1. neurovascular injury: under blind vision or inexperienced doctors and irregular operation, arterial blood vessels will be damaged and hematoma or even hemorrhage will occur; if the facial nerve is damaged when the facial injection is removed, the consequences will be more serious and facial paralysis signs will appear; 2. skin unevenness: the fatty tissue at the injection site has been invaded and degenerated and has to be removed, if the injection If the injected material invades the soft tissue and the injection level is very shallow, the injection location will be depressed after the injected material is removed; 3, residual injected material: for some injected material, only most of it can be removed and a little foreign material may remain, which usually does not cause systemic effects; 4, local skin damage, thinning, or subcutaneous tissue hyperplasia, and skin necrosis may occur in individual cases with severe damage.