Not always, but frequently, the shower head drips water after turning off the water which causes a problems if trying to dry yourself before leaving the shower. It does it every time, for 4 or 5 days, then will stop for 20 or so days, then start again. How can this be fixed?

Most shower heads will drip for a little while after shutting the water off... just air displacing the water from the shower head by gravity is all. In this case, however, it does sound like you may need to get a replacement shower cartridge and replace the cartridge assembly to solve the problem. Determine the name brand of the shower valve and contact the manufacturer of the valve... most likely, the parts are under warranty and will be sent to you free of charge.

Post back if you have any other questions.

Mark