text: i have really bad mood swings and i   would like to know what would be making me that way?? one second i am happy,the next minute i get raging mad,they checked my throid and everything is fine so what else could it be??? there are several mood disorders that can cause this, but it may not even be that serious. it could just be stress. here is a website from the national institute of mental health (nimh). search the site well looking at the symptoms of the mood disorders and see if one fits.  hope i have helped!  sincerely, terry