Hi There? My Brother 36 Year Old He Just Up

Hi there?
My brother 36 year old he just up set now or other case depress some time he will feel fear and very angry mood and talk different eg repeat the question and answers ........
He devorce 3 year before we
thinking that the actually problem he not sleep well awake up early hours if we ask him about any think he said why u ask this that or ask unnecessary question,
Please help