To qualify as mixed mania, an episode must simultaneously meet the requirements stipulated for a major depressive episode or a manic episode. Your symptoms must occur nearly every day for a week straight. When experiencing a mixed manic episode you commonly exhibit uncharacteristic emotional storms. You may yell in the morning and cry in the evening or to be boastful one minute and self-deprecating the next. Or you may just experience a constant feeling of agitation or irritability throughout the day.
Source: Bipolar Disorder, Camila Flink, MD , Joe krainak