My personal experience:
Every process where you are healing what was previously fragmented (trauma) or bringing it to the surface (from unconscious to conscious) will go hand in hand with the release of this negativity. Mostly this release happens through negative emotions, since what is released is usually the negative emotional energy that was attached to old negative beliefs and patterns.
This is logical to me as you cannot rise higher unless you release all that previously stored negativity that was keeping you down.
This is a multifaceted release process with different negative emotions describing different negative things that are released.
For example, anger can happen because you realize that you have lived a lie and was telling lies to yourself just to stay comfortable or in denial. When you come clean with yourself (which you have to do in order to feel complete and whole again), then all these lies to oneself also are becoming consciously clear now and which can trigger anger and resentment towards yourself and the world around you ā because you have simply lived a lie. Now with you coming clean with yourself, it is natural to feel some anger about how you were so foolish and how you didnāt love yourself enough and allowed yourself to live this lie in the first place.
So all those negative emotions usually represent all the frustration about why and how you did not loved yourself in the past.
The ādetoxā and release of negativity is stronger in beginning but becomes less over time.
I am in the process of ābecoming wholeā and āvibrationally ascendingā myself on a daily basis. As you can tell from my posts sometimes, there are days where I vent a lot ā these are days when I have strong release symptoms. But as @Beast mentioned, it is all worth it, because every time when the process is finished, you emerge at a higher and new permanent baseline.
It is literally the process of āLeveling Upā and āAscendingā.
It is also called āburning off karmaā, because you are "burning the negativity off of you and as we know āburning = unpleasantā.
The tiring aspect mostly happens when your new state of being is being followed up by its physical manifestation. For example:
You release a trauma ā your Subconscious Mind now has new beliefs about something ā your Subconscious Mind begins to readjust the wiring in your physical brain according to these new beliefs ā physical rewiring requires energy and can be tiring