After a collision with the cochlear implant, it is common that the implant may malfunction and there may be hematoma and fluid leakage from the implant under the scalp. If at this time there is simply no malfunction, the cochlea functions normally and can be listened to normally, but only when there is hematoma under the scalp, at this time we can conclude that there is a hematoma, we can use a syringe to aseptically draw out the fluid, apply a pressure bandage or prevent infection, and then give some antibiotic treatment and avoid strenuous exercise. Active involvement in the management at this time can get the cochlea to work properly in some cases. If further development of the cochlear electrodes may collide, the cochlear electrodes work up and the patient hears that he cannot hear the sound, or some malfunction for various reasons, then surgery may be needed to replace the implant again.