And from kidney stone you need to get rid of.

 As in my hubby kidney stone is 3 cm, nothing feeling as and discomfort, and a few time he used tests,and urea current out is good, but am worry such a size of stone,as he slowly grows,and am understand he will not hide, but hubby nothing interesting about other testing and surgery, what is need to do?

A how to fight stone?

And you are right dear Veronica, as waiting and nothing doing is error,which is a bad affecting on a future,and such stone size is indication to activity actions answers professor,doctor Enikeev. As today in such stone size are possible three variants for development as first is if stone having of urea acid ,thus you can dilute his,as for first is checking urea environment as PH metric,as stone density with CT and detailed urography as urea stones having density are 500/600 conditional units by Housefield ,and checking level for urea acid as for blood and urea as they are often sometimes here,as patients such are obesity, and joints problems having as gout etc.

And second,third variant is surgery as endoscopic surgery,as a first spreading in  urologic stationary is through skin nephrolitropsia as stone removing through cut in waist side,as popular surgery with a common analgesia ,as stone from a miniature till standard as 3/5 till 8/9 mm in diameter is finding with endoscope as nephroscope and after he is fragmenting by ultrasound or laser is depending from stationary  equipment and surgeries preference.

Third variant is Retrograde intra renal surgery RIS  as with ultra thin flexible endoscope by a urea ways as urethra and urinary duct to the stone and his fragments with laser tissue. As pieces removing with a thin forceps or they are self washing out as a stone.

And all of these variants in your case are possible, but optimal selecting is urologist,and a variant,which he is practices.