Get basic work up done for lower urinary tract symptoms(LUTS) that includes clinical examination by a urologist,per rectal examination,serum Prostate specific antigen, uroflowmetry, urine examination.usg for KUB,prostate&residual urine Also work up for size, locations and functional Derangement  caused by stone. Basic renal function should be assessed. Consult a urologist and treatment as per findings