Irritability is emotional and can have many sources—lack of sleep, hormones, stress, anxiety, worry, chemicals, etc. Shortness of emotional control can produce anger, rage, and violence. Anger can be appropriate but shouldn’t arise from irritation (Eph. 4:26). The result of irritation becomes sinful when it affects behavior or creates needless, negative issues with others. Irritability (Gr.paroxynetai, ‘to make sharp, provoke’) can expose selfishness that at other times might be hidden if something is delayed, denied, or disrupted. There are no ‘bad days’, just bad reactions to unwelcome circumstances.