Recrudescent
/ˌriːkruːˈdesnt/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
Often implies a problem or something unwelcome returning, such as a disease or conflict. 
The recrudescent violence in the region has thwarted efforts for peace.
Pro Tip 2/3Medical Usage
Commonly used in a medical context to describe symptoms or diseases that return. 
The patient's symptoms were recrudescent despite the treatment.
Pro Tip 3/3Historical Events
Used to describe events or issues that re-emerge after being dormant. 
The recrudescent debate over the country's history has sparked new discussions.