In some cases, people experience swelling after their lip filler procedures. The amount of lip filler used on a patient can also impact the risk of swelling. This is a completely normal side effect and tends to show through after a day or two of the treatment, before reducing and returning to normalcy after two weeks. If lip swelling does occur, then one can apply ice to the lips using an ice pack or an ice cube covered in cloth. This will help ease any swelling, itching, bruising, or pain that may occur as a result of the procedure.