I used for cleaning named sano oxygen .. and then became the fingertips of my hand hurts and under the fingernail color red..why?and what i do?

Wear gloves: You used a cleaning agent called Sanyo oxygen and now your fingers hurt. The cleaning agent probably has peroxide in it and exposure may cause a contact dermatitis. This will cause pain maybe even itching. Wear gloves with any strong chemicals. You may even notice the skin on your hands start to flake in a couple days. Be careful and hope this helps.