I had plenty of these this and use to use antibiotics..worse thing there is to do.
The health food store has all natural cranberry juice (no sugar added). Be careful when using this stuff. I drank the whole quart in one day and my face turned into one big rash.
Drink one quarter of a cup five to six times a day (depending on how bad it it) and in between drink lots of distilled water. This cleared mine up all the time.