Urinary tract infection
There isn't anything available over the counter to treat urinary tract infection. However, you can get medication that can help ease the burning pain while urinating.
What you can do?
Drink plenty of water every day. Some doctors suggest drinking cranberry juice, which in large amounts inhibits the growth of some bacteria by acidifying the urine. Vitamin C (Ascorbic Acid) supplements have the same effect.
Urinate when you feel the need; don't resist the urge to urinate;
Wipe from front to back to prevent bacteria around the anus from entering the vagina or urethra;
Take showers instead of tub baths;
Cleanse the genital area before sexual intercourse;
Empty the bladder shortly before and after sexual intercourse; and
Avoid using feminine hygiene sprays and scented douches, which may irritate the urethra.
Over the counter treatment