Hi i am Dr Ahmed Aly thanks for using HealthcareMagic site , I had gone through your question and understand your concerns .. It could be a minor renal stone or gravel that have passed through his ureters and have injured it s endothelial lining and thus causing bloody urine . I hope your husband feels better soon , try using declophen tabs with his pain attacks , maintain high fluid intake to prevent further dehydration , avoid high salt and protein meals . anti spasmodics are helpful in most of cases . For my patients i recommend urine analysis , SUA , ASOT , BUN and Doppler u/s on his kidneys to properly diagnose the underlying cause and the size of the gravel . sometimes the renal stone is a bit large and cause obstruction and prevents passage of urine and fluids to his urethra . Medications may include allopurinol for uric acid stones , diuretics , lithotripsy sound waves treatments or ureteroscopy in more complicated cases will be effective in most of cases . If pain persist i recommend you follow up your investigations with your nephrologist for proper evaluation and management. Please click and consider a 5 star rating with some positive feedback if the information was helpful. Wish you good health, Any further clarifications feel free to ask.