The rash on my right hand....

My right hand is itching badly again. The rash is back. I saw some dirty dishes at the kitchen sink and went and washed them up. I forgot i have a tiny scratch on my right hand and it reacted to the detergent causing the rash to spread to my wrist. It's not the first time. It will subside in a day or two, provided i dont scratch it in my sleep. Talking of kitchen sinks, i think my MIL wants to change to those stone sinks. Are they good?