Type 1 Diabetes, How Long Does It Take For Anger/irritability To Subside After Experiencing A High Or Low?

My daughter is 4 and she is REALLY moody from time to time. It seems to be only on the days when she was high or low. I know this is a side effect but I need to understand more. Since she isn't able to convey her emotions through words yet please let me know what it feels like, from your experience. And what helps/doesn't help, makes it worse/better, any advice from another type 1 diabetic would be helpful.