To prevent cystitis is..

Liquidation an infection nidus,as wash sex organs till 2 times/day, change tampons, or pads on menses time in every two hours,and secretion strangers from vagina in to ask a doctor,as meaning about disbacteriosis presence. Do not sit on cold surfaces,wear right clothes by wether,do not wear short clothes and light,tight on winter,autumn cold weather,every 10 minutes to wake up and  knead,if a work is sitting,go for pee if need, do not delay it,check for diet,with poor eating salted, marinades,alcohol, drink a water till 2 l/day,as and non gas, non concentrate juices.

A damage is better to prevent,that to treat! Attention will be to an own health!