No procedure is without risks and complications. The main concerns after a buccal fat pad removal would be:

• Infection:
  It is important to follow all aftercare directions regarding oral hygiene, as incisions are made inside the mouth. Signs of infection include increased redness, swelling, and discharge. Contact your surgeon if you notice any of these symptoms.
• Asymmetry:
  Minor asymmetry may occur, which can often be corrected with a minor revision.
• Nerve damage:
  Although rare, there is a slight risk of nerve damage affecting facial movement.
  

In order to reduce the risks, it is important to choose a trusted provider and always follow all aftercare directions.