I'm glad you've reached out to members here, I'm pretty sure something someone says will resonate and help you.
So far, everyone has said something that resonates with me....thanks

Since you can't find a base cause for your anger, I would agree that it may be an old coping skill.

Tough love response: anger is often rooted in selfishness. When things don't go the way we want, when people don't say or do things the way we think is best, anger can result.
In part, I do agree with your statement. I don't have issues when things don't go the way I want them to go. I've learned a long time ago that, that is life and there is always a reason or another way to accomplish the goal. People are people, they will say and do what they feel they want/have to. The only ones that can cause me to feel the anger I am describing are my family and others that I love. So maybe in that vein, your statement has some basis

Feeling out of control, fearful, or neglected can result in an angry response also.

Oh yes, those times can definitely do it!!

I suspect that it isn't any one thing (well, for me, it rarely is) but each situation is a bit different from the next.

It's good that you recognize it. Yes, even "hearing your mother's words" is a good realization. Once you are at this point, you're close to gaining the upper hand, imo.
I pray you are right (JD)!!

When you find you lash out in anger, try and counter it asap. Find some set phrases that suit you and say one to whomever you lashed out at ... "Oh I didn't mean to say that" or "I didn't want to be so angry" etc.
Good ideas! I will definitely try those.

One tool I would give others in counseling for anger was to try and depict when they were becoming angry, and tell the person that, such as: "This situation is making me really angry." Try not to put it on the other person as in, "YOU are making me angry." If it feels like it's them, then try and focus it elsewhere, "What you are doing is making me angry." i.e.
Okay, I think the second quote I can do easily as I use that kind of thing when I'm with young children (the grands especially) because I don't want the child to think I am upset with them, just with the behavior they are exhibiting.

Try and limit your exposure to things that feed frustration and anger. I, personally, have to limit my exposure to current news or the whole world seems out of control for me and I become quite upset, which can boil over to anyone around me. Though that hasn't happened in a very long time, I think it still could at times.
I can understand why the news and world issues would make you feel angry. It's heavy stuff for sure. But, it's kind of hard to limit my interaction with my immediate family (and I really don't see them often but there are lots of phone calls).

Depression also holds a component of anger, btw. But recognizing that it isn't a good coping mechanism is still the best first step. PTSD causes the anxiety that creates the frustrated, lashing out, behavior as well.
Having Fibro, I'm on an antidepressant that also helps with the body pains, and I don't really feel depressed. I feel tired a lot and that can lead to frustration when I have things I have to do and no energy or I'm still in pain and it's hard to move. I know you understand the pain thing.....I'm sorry you can understand it so well though I do have some PTSD moments and I've been working on those and the triggers.
Thanks so much for taking the time to post (JD), I appreciate your input!