I have been cleaning the floor at work with bleach

Patient: I have been cleaning the floor at work with bleach and then walked home. As I take my shoes off, my left foot has a large area that looks like clean burn but the skin is numb and blue in colour. My shoes were blue so it’s very possible that is where the colour came from. I have been flushing my foot under cool water for over 30 minutes and the color has got lighter and red dots are appearing over the exposed burn area. It’s not painful but Any advice would help

Doctor: