Welcome to HCM,
In your query you haven't mentioned the purpose behind Cystoscopy
Cystoscopy can cause some injury
to your bladder mouth.
is common after Cystoscopy.
Generally it doesn't require any treatment. It will heal within a couple of days.
Drink more water.
Thanks for posting your query.
Hope you found my response to your query informative and helpful.
If you have further concerns in this regard, I would be happy to discuss those with you as well.
With good wishes,