Uhh sorry this is long... I'm never brief and I type fast.
Hi,
My ED is so much about anger, too. Mostly self-hate, and a lot of holding things in that the only way I can express the collection of feelings is acting it out with myself.
There are been a lot of times I can healthfully process anger, mostly through art, physical movement (I've taken walks when I'm pissed off since I can remember), and screaming in to a pillow or ripping paper... writing sometimes and venting the foulest stuff I can think of to my T in a steam of consciousness.
I also do some physical pushing away work too - with both my T and the somatic T. It releases blocked anger somatically and I always feel amazing after.
When I started therapy, my anger was directed through my projections on my T (many times they still are) and the intensity behind them. As well as fear (of closeness, of being seen, of many things...). My T will prod where she can at any hint of anger I have, and push my limits. So... it's prominent in my therapy I guess is how we're starting to "process" it. I have a long way to go (especially because of my SI, ED, etc).
Do you and your T see anger and assertiveness as one in the same? I'm very assertive, but still a long way with dissipating anger.
Sorry to keep typing... another thing I found that helped process my anger in therapy was dismantling some of my defenses, particularly with irrational thoughts. If I woke up late on the weekend (like past a specific time) I would be enraged [I have a thing about time - it's definitely related to growing up]. It would ruin my whole day that I woke up at 10:15 instead of 10:00. I haven't felt that way in 2.5years and it's a relief. I don't even think about it anymore, or care. It honestly does not matter, even if I had something I wanted to do and missed it; my whole day is not painted by sleeping in.
The major part, that's really hard to talk about is boundaries with others. People do not have to agree with me, and what I think can still be true (my T wrote this on an index card for me that I have posted up on the inside of my medicine cabinet). I do a lot less blaming. If I'm angry it's not "someone else's fault" no one can MAKE me angry, only I can make me angry. If I'm angry about something... I'm angry, that's it. I feel that way because of something inside me. From this I've learned that... I can't MAKE other people angry (including my T, and anyone). If people are angry they are angry, I don't have some mystical power to force them to be (even though their reactions to me or my actions can cause anger). This also means I eventually have to accept that I didn't CAUSE my parents to treat me how they did - because I don't have the power to "make" anyone do anything.
So... working with those thoughts was HARD. I wanted to bludgeon my T a million times. And I certainly went to war with her on keeping my defenses and magic powers. In my uneducated opinion... anger can be processed in a lot of ways. It doesn't mean screaming and yelling. I think processing it means reclaiming yourself. My somatic T told me once that anger is a "DO" emotion, and can indicate one of my values was violated. I value being listened to, so being ignored can irritate me. I value... not robbing people, so if I was robbed I'd be pissed. I value you my relationship with my T, so when it is compromised for whatever reason (from my feelings, or an actual thing) I'm angry. I value having a body I like, and I don't like it... so I'm angry, and I punish it and the person who owns it (when I change that value, which I'd like to... my reaction will change).
I think it's something we always work on... different ways to express, or direct anger even if it's not called "anger". Anyhow, working on self awareness has helped me process my anger. I think I'm a long way from being complete and embracing the anger I have about the past. My disposition isn't one that tends toward anger, not always but I tend not to avoid confrontation. So, if someone does something that irritates me, instead of making up 1000 stories and brooding on it... I'll usually tell them and go work it out. T has said she appreciates I can keep it real (more so now than before), so have my friends (thankful that they don't have to waste time wondering, and as a result... neither do I because they'll be real too). Some of my friends can't handle it, and I'm not as emotionally close to them as a result because I have a low drama tolerance - I think I'm more okay with rejection because I gently reject people on a regular basis.
OKAY THIS IS LONG. To work on it... I think you're right..... there needs to be some assertiveness 'thing' involved in it. And I think the work can be covert as much as overt sometimes. Basically, I don't know either... and would love to hear others experiences