'Fraid so, when untreated I can easily go from quietly enjoying life to wishing myself dead in an instant, then from mild irritation to fiery rage even quicker. Keeping a record and backtracking is something I find useful - there is always a reason, generally embarrassing/painful and always irrational or at least inappropriate to the situation. With practice it does not take long to find the cause, but detecting the cause in advance and avoiding mood swings is a little harder. But if I don't I could throw away all that I have worked for and all that I hope for.