Dry itchy skin I feel like glass is coming out of my skin. I have on one kidney?

Get to a doctor. You need to see either a urologist or nephrologist right away. It is quite likely that that you have a post renal (after the kidney) obstruction causing urine to back up into your one good kidney which will fail if not relieved of the back pressure. The skin symptoms are the result of increasing buildup of creatinine and BUN, the waste products that the kidney removes when functioning well.
? Too brief, not enough information to give you a meaningful answer, if you do have one kidney and have renal failure your skin condition may be related, either way you need to see your doctor who may refer to a dermatologist, wish you well .