You Do Need power plug adapter while traveling from Bahrain to Italy.

Here is Why You Need An Adapter

The outlet and plug type used in Italy are C, F and L and in Bahrain is G. This is how they look like.

Bahrain

In Bahrain, outlets of type G are in use.

Type G

Italy

In Italy, outlets of type C, F and L are in use.

Type C

Type F

Type L