Have Urology Questions? Ask a Urologist Online.
Hello and welcome I'm Dr Chip
Have you had a urinalysis done?
Sorry but I need to ask--are you male or female?
Any discomfort when you urinate?
And these are jet black and look like solid tissue and not clots?
This has to be from your bladder wall and it may be a sign of interstitial cystitis--an inflammatory problem--or a chronic bladder infection
Either way, you need to have your doctor evaluate this with first a urinalysis and then a bladder ultrasound
Please let me know if you need any more information
My pleasure but let me know how it goes and please rate my service to you so I can get credit for my time