Hi there!
Well, without knowing the relevant clinical details or a detailed clinical evaluation it would be difficult to determine the cause of your symptoms. Possible causes that may need to be considered include GU infections, inflammations, trauma, injuries, erosions, ulcers, neuro-muscular causes, growths/ masses, referred pain from other regions, hormonal/ endocrine causes etc. I would suggest getting this evaluated by an internist initially and depending on the cause diagnosed/ suspected, it can be managed accordingly or specialist care may be sought.
Hope this is helpful.
Take care!
Sorry, also forgot to say skin on face has blotches. May be related to above Urinary?