Water pick

The oral irrigator comprises an oral irrigator body, a main water tank, a water pump and an instant heater, the oral irrigator body comprises a handle, an auxiliary water tank and a nozzle, the auxiliary water tank is connected with the handle, the nozzle is arranged on the handle, the main water tank is communicated with the water pump through a first pipeline, and the water pump is communicated with the instant heater through a second pipeline. The instant heater is further communicated with one end of a third pipeline, the other end of the third pipeline is detachably communicated with the auxiliary water tank, and the oral irrigator body has a first state and a second state; when the oral irrigator body is in a first state, the third pipeline is communicated with the auxiliary water tank, and liquid in the main water tank sequentially flows through the first pipeline, the water pump, the second pipeline, the instant heater and the third pipeline and then flows into the auxiliary water tank; and when the o