Anger Storms

Well you've all heard, of course, that a woman's emotions flow up and down with the tide. Since this is the natural state of a woman's cycle, I would assume that it's that way for a reason.
However every once in a while, an inexplicable surge of anger takes hold, (my "Anger Storm") and makes it really difficult for me to find the patience I need to take care of my son, husband, animals, and anything else that needs to be done. I'm not sure why the anger comes- I've tried to pinpoint a reason, but there really doesn't seem to be anything that triggers it, except the fact that I am a wife and mother which means most of my day to day living is spent caring for others, taking care of their needs, and sometimes my patience just reaches its end. However, usually I can be patient and caring for a long, long time. When the anger storm comes, I just want to fight anything or anyone that tries to hold me back. Today it came again, and I ended up punching the barn wall in frustration while doing chores.
I'm not really sure why this happens and what I can do about it. I do a fair amount of yelling and cursing and resist the urge to lash out at living beings and instead take my anger out on objects. Usually it passes quickly and leaves me with a worn out feeling, and I end up crying for a minute and then going on with my normal life. I do occasionally take a day off from my caregiver duties to go relax and hang out with other people, so I'm not rest-deprived (well I am, but no more than any other new mom.) It seems to be something that just comes and goes, like PMS. And I'm not sure exactly what I can do about it, but it does occasionally leave me scratching my head and wondering why do I feel this way?