For the sake of the story, Hinata suffers from similar conditions like a nervous bladder and bowels. The more embarrassed/bashful she gets, the more sudden her urgency becomes.

After asking Naruto out on a date, or getting him to go with her to a festival, Hinata finds herself facing difficulties trying not to embarrass herself, and act naturally around the boy she loves.

Can lead to accidents, being accompanied to the bathroom, whatever the writer wants.

Late one day on her way home from a late night training session. Hinata was pulled into an ally by a mysterious woman who placed a curse seal on her ass cheek.

 The effects are as followed.

 1: Slow but constant growth in the breat and ass.

 2: random intense episodes of uncontrolable hornyness that often make her masterbate against her will.

3: constant production of cum that never stops completely flowing and comes out in pintes during hornyness episodes.

4: random intense urges to defecate and/or urinate that can be held but the longer she holds it in the bigger the load get. holding it for even 5 minutes will priduce enough shit or piss that could half fill a large trash can.

 Because of the 4th effect she will be unable to use toilets without overloading it and is forced to wear loose fitting streching sweat pants or rubber pants. accedents will be very frequent.