How many days would be swollen cheek after abscess?

Swollen cheek: If the abcess is due to an infected tooth or infected gums and is untreated, the swelling will continue to enlarge. Depending on how long you have had the infection and how large the swelling, antibiotics should help reduce the swelling in 5-7 days. But the abcess needs to be treated. If due to an infected tooth, you will need a root canal or an extraction. See you dentist.

Swollen cheek: The swelling should start going down within a day or two at most as long as the cause of the infection is being treated and you are taking the proper course of antibiotics. If not, let your dentist know right away. Unresolved infections can result if serious complications.

As long as infection is present, there will be swelling. If cause is abscessed tooth, treatment is antibiotics + root canal treatment/crown or antibiotics + extraction/implant/crown. Please discuss this with your Dentist.The sooner the tooth is treated under then umbrella of antibiotics, the sooner swelling will go down.