Hello and welcome to HCM
Presence of brown coloured clot after passing urine indicates bleeding from the urinary tract
Passage of blood after passing urine is usually from the urinary bladder
It could a benign or malignant growth in the bladder.
You need to get your complete hemogram done, urine microscopy for malignant cells.
The bladder needs to be viewed with a cystoscope to look for any growth in the bladder.
Please see your specialist (surgeon) soon.
Thaks and take care
Dr Shailja P Wahal