One year ago my wife went under hysterectomy and not showing interest in bed i am in 30's what should i do ?

I've heard this even from my own wife, but much later in life than your case, where the woman doesn't feel anything special "down there" any more. I really think it's all in the mind myself on how one feels having , moreso than how it makes parts of the body feel. I think since there is no challenge there to possibly make a baby, the female feels it's almost become a useless accessory.