Rule out the cause and risk factors. Bubble baths, low estrogen, certain spermicides,altered vaginal flora, and toilet hygiene are some of the factors that can contribute.
Drink lot of water which is very important. Take unsweetened cranberry juice.
Fruits such as watermelon, cantaloupe,mango,and peach are good for treating cystitis.
Do not ignore the need to urinate however busy you may be. Not doing so can encourage an infection.