If your tap and the wall behind it are both leaking, it usually indicates a problem beyond the tap itself.
The most common cause is a failed internal pipe or fitting inside the wall, such as a loose connection, corroded pipe, or damaged seal. Water can then travel through the wall cavity and appear around the tap area, making it look like both are leaking at once.
This type of issue should be checked promptly by a plumber, as hidden leaks can lead to water damage, mould, and structural problems if left untreated.