"Medication treating Crohn’s disease is designed to suppress your immune system’s abnormal inflammatory response that is causing your symptoms. Suppressing inflammation not only offers relief from common symptoms like fever, diarrhea, and pain, it also allows your intestinal tissues to heal.

In addition to controlling and suppressing symptoms (inducing remission), medication can also be used to decrease the frequency of symptom flare ups (maintaining remission). With proper treatment over time, periods of remission can be extended and periods of symptom flare ups can be reduced. Several types of medication are being used to treat Crohn's disease today."

References:

1. https://www.crohnscolitisfoundation.org/What-is-crohns-disease/treatment