A light tingling or buzzing feeling you might get from metal switches, lights, or metalwork just at kitchen sinks, pipes, or water out of your taps & shower may be down to lack of, or improper, earthing, and should be investigated with the seriousness of a C1 fault.
The only real way of telling whether your electrics are completely safe is by having a thorough health check on the electrics (EICR) carried out by an experienced electrician. We specialise in these - please find out more here.