Why my Cheeks and Lips Are Still Swollen After 48 Hours of Treatment?

Swelling after fillers can be present for up to two weeks. There are certain fillers that can cause more swelling as well (i.e. Juvederm). Ice packs and keeping your head elevated while sleeping can help with swelling. Some people who are predisposed to allergies and hives can get a hive-like reaction where they are injected. This improves with time and can be treated by anti-histamines (will make you sleepy). If it hasn't improved after two weeks, I would return to your injector for evaluation. 

Swelling following lip and cheek augmentation may last from a few days to a week. Some people will stay swollen longer.  Ibuprofen  and elevating you head on a couple of pillows at night may help.  Ice can also help if applied immediately after the procedure.  The swelling should improve every day, so patience may be your best option.