$hash{key1}{value1} = 1;
$hash{key1}{value2} = 2;
$hash{key2}{value3) = 1;

##</code><code>##

my $check = scalar keys %{$hash{$key}};

##</code><code>##

forach my $k (keys %{$hash{$key}}) {
 # $k == the value i am looking for.
}