Can you put too much shock in your pool?

Shocking should be done in order to kill the chloramines. It depends on your chlorine level. For residential pools it should be 1.5-2.5ppm. For commercial, chlorine should be 3.5-4.5ppm.

If you have just shocked, don't go in the water. The chlorine is probably 10-12ppm and will cause itching and burning. Wait until the level drops to a safe level, as stated above.