Shower head and shower

The invention provides a shower head and a shower head which are simple in structure and have a descaling function. The shower head comprises a shower head shell head part, a shower head shell connecting part which is connected with the shower head shell head part and is used for being communicated with a water inlet pipeline to feed water, and a water outlet cover plate which is rotatably arranged on the shower head shell head part through a clamping device, the water outlet cover plate is provided with a plurality of water outlet holes used for discharging water, and a descaling device capable of ejecting out scale in the water outlet holes is further arranged between the water outlet cover plate and the head of the shower head shell. The descaling device comprises an ejector pin plate and a plurality of ejector pins, wherein the ejector pin plate is arranged between the head of the shower head shell and the water outlet cover plate in an up-down sliding mode through a sliding device, and the ejector pins a