expression, godan verb (-ru)
be bad for one's health; affect one's health
Used when something (food, habit, weather, etc.) has a negative effect on physical health. Often appears in warnings or advice.
夜更かしは体に障るよ。
Staying up late is bad for your health.
冷たいものばかり食べていると体に障ります。
Eating only cold things will affect your health.