You had Radical hysterectomy
10 years back and Total knee joint Replacement
few months back. Now you have bloody mucus from the vagina while urinating.
Don't you have any vaginal discharge
when you are not urinating?
Your present complaints need not have any connection with previous surgeries
It can be a UTI or vaginal infection
You have to investigate your urine for UTI or vaginal smear for analysis.
Specific antibiotic, anti inflammatory, mild diuretic
, vaginal douche or cream and medicines to arrest the bleeding will be useful.
Along with this if USG abdomen is done, the exact cause will be found out, then the treatment will be easy.
Mean while take plenty of water.