Prevalent vs. Existing: Which Word to Use for 'Existing Problem'?

'Existing' refers to something that currently exists, encompassing the past, present, and future. 'Prevalent', on the other hand, indicates something that is widespread, often implying a problem or phenomenon that is common or ubiquitous within a specific region or society. Therefore, when referring to an 'existing problem', 'existing' is the more suitable choice. If you want to emphasize the widespread nature of a problem or phenomenon, 'prevalent' would be the better option.