No matter what plastic surgery you do, you should choose a good hospital doctor.
Preoperative consultation, face-to-face consultation and postoperative nursing must be done well.
This situation is usually caused by inaccurate double eyelid surgery time measurement, too wide incision, or too little fat removal during operation. You can choose secondary repair, reposition, design the shape of double eyelids, and then repair.
I hope the above reply will help you, and hope to adopt it.