I had a renal biopsy at age 47 to explain why I had hematuria. Finding out I have IgA nephropathy , you can google it, and then I remembered, after the fact, I spent 6 months in bed at age 6 for this disease. The puncture biopsy only hurt when they pulled out the needle. I had to lay in the hospital bed overnight due to some bleeding. I'm very glad I had the biopsy back then, but my nephrologist wants an updated biopsy to which I have declined. At age 77 I hardly think it's needed. I have a cousin who had same disorder, but she had to have a transplant. Water is a good thing ,but my nephrologist told me to increase my vitamin D levels. He said it is one of our best tools. Also rest and walk for exercise, with a thankful attitude. Watching my renal diet helps too! Gods speed cause He really is the one in control. Do the biopsy if you have never had one. Information is the key to proper treatment.