red flashing screen on low health

[Radoznali]

Is there command that can tell me what addon is causing red flashing on side of screen? I am asking since its anyoying to me to be triggered at 40% hp and i have way too many adon to check each and everyone.On top of it i checked all of addons that i might think causing/inflencing it and i cant figure it out.

PS:After i made tread i saw title iswrong since its not aggrro but loss of HP