Most people have " triggers" My personal ones are
1.if my sleep is messed up .
2.any kinda of major argument with someone can send me reeling into mania ..
3. it appears when ever it wants too

I dont get the BAM im happy and I can rule the world mania ..I get the ugly self destrucutive mania .. I rapid cycle so its not uncommon for me to be manic and depressed in the same day .

Keeping a mood chart is often helpful in seeing a pattern of episodes ..

Good Luck .. Keep posting and welcome to PC