I have to admit this is something I think about too. A new member at the trans group I attend asked what dysphoria was...
Presuming what I suffer is dysphoria then it manifests itself differently... and I am still waiting to see a professional to confirm it one way or the other.
From what I can remember in my childhood, it felt like an overwhelming desire to be female. Like an ache in the gut/heart. A sense of envy. But it would be so overwhelming that it would just consume me.
As a teenager, this slowly ate at me during puberty and the desire would make me take a knife to myself several times but I could never follow through. I tried to tattoo down there too several times with a compass and ink... thankfully those attempts failed. I tried to tattoo the female symbol and 'I am a girl'.
In my late teens, I tried to butch up and took up weight lifting. That made it much worse. I had a very good friend who was bisexual female and she would do my hair for me (I had long hair then) and experiment with make up. We had a falling out and that bit of feminine release and losing a friend sent me into deep despair and depression. To the point where I was going to just end it all. If I couldn't be female then I had no point in continuing and if I couldn't have my friend who helped me, what was the point?
Thankfully, I was rescued by some people who were deeply concerned about me and slowly pulled myself back together but I had messed up my education in the process.
Then the overwhelming desire again into my early 20s.
During this period I had opportunity for release in dressing and the depression was offset by periods of elation when dressed.
In my late 20s and into my 30s, I started dating a series of bisexual women who treated mostly female and that was great release. So my 'dysphoria' wasn't so strong then. Eventually met my wife and she would buy me bits and bobs and we would play about similar to the girl I knew in my teens. My wife didn't want me to dress anymore, insisted I grew a beard (to stop me dressing), and I tried to be a man for her for the last 8-9 years. Stopped dressing completely.
I sank more and more into depression. Became more and more withdrawn. Stopped speaking to my wife. She ended our sex life before then. Started having anxiety attacks but these were as much about everything else that was happening in my life and the 'dysphoria' just added to the top.
Then the dysphoria changed. I started getting very stressed and agitated at things that 'forced' me to identify as male and the 'need' to hide who I was, to keep the Big Secret. I felt it building up in me... the pressure and I knew it was going to be bad, so I reached out for help and was left. Then it came crashing down on me. Years of suppression... I just couldn't hold it in anymore. It felt like my sides were splitting apart. I couldn't stop crying. I was both physically shaking, and when that stopped, I could feel my flesh under my skin shivering. My emotions were bouncing all over the place, from amazing elation where I could not stop laughing to deep despair in minutes. This lasted for over a month. It still happens but since joining the trans group and exploring myself more, the feelings are becoming a little less intense but still bouncing.
My dysphoria worsened too. I see a woman whose style I like and suddenly I find myself in a pit of despair that I am not a woman and the tears will start rolling. Someone calls me my male name and it feels like a bit of me has died. Same if someone refers to me as 'dude' 'mr' or any other male identifying mark, the most painful is 'daddy'. It causes me both stress, anxiety and depression... although the latter two are not to the same intensity as when other factors come into play. Two weeks ago I had my first bad bathroom experience. It wasn't that I wanted to use the women's toilets because I am not presenting female, it was just the sense of depression at being identified male. Getting dressed in male clothes is causing mild depression too, because it is identifying me as male. As is body hair. The thing is that when I do something feminine, I feel elated but when I go back to being male, it makes it more difficult and the depression sets in. So sometimes I wonder if I should be exploring my feminine again because it makes going back to be male much more difficult... but I know that I can't not proceed. The thought of having to live with another collapse like 2 months ago is too painful to consider.
The shift in my dysphoria has been that before it was an overwhelming desire to be female, and now it is still that but more so a hatred of being male and being forced to identify as male.
In terms of feelings it is desire, envy, depression, anxiety, and stress. These are sometimes coupled with fear, embarrassment, and shame. Although I am slowly working to overcome the latter 3 emotions. And often in the mornings, doubt.
I am unsure if that is helpful to you or not. But that's how I experience dysphoria. It is difficult to pinpoint because usually life is throwing other stuff at you too and you become accustomed to living with constant stress, anxiety and depression that unless something adds to the mix, you don't realise you are suffering. Sometimes it takes someone else to point it out to you and then only when you start dealing with it that you realise how bad it was getting.
Take care and if you just need a shoulder to cry on, know that this is a safe space and you can pm any time.
love
Alice