My shower head continuously drips in my shower stall after I have turned the water off. The funny thing is, it is a hand held so it is enough to push it up the hose and out. I have adjusted the faucet knob and it made no difference. If I take the shower head off the holder and let it hang, I hear a noise that sounds like a toilet flushing coming from the wall. If I disconnect the hose from the pipe sticking out of the wall, a ton of water comes gushing out of the pipe. There are no other valves to adjust other than the faucet knob. Any help would be appreciated. By the way, the most I know about plumbing is how to flush a toilet.

Thanks,