My sons water pipe started sounding like a whistle when using the shower. What causes tjhis and how can I stop it?

Thank you,
Barry

Shower head is clogged/ restricted or there is a water saver restriction behind head that could cause the sound. Check that and if not solved now it to a shower faucet.
Signed 21 boat

:)
Shower head is clogged/ restricted or there is a water saver restriction behind head that could cause the sound. Check that and if not solved now it to a shower faucet.
Signed 21 boat
Sounds like that may be the answeer. I'll give it a try.

Thanks,
Barry:)