Sometimes this chastity does make me think if this is really me needing to be submissive or I am just into this kink because I feel sexy.
Blue balls does give me a chaffing even after applying lube or vaseline as it gets full and also the pain. I am only allowed to remove my cage during workouts else I also sleep with my cage on.
My dom wife is also new to chastity play and most of the time she gives in when I ask her to open because of blue balls.
There's a difference between giving in and taking what she wants. Trusting there's no medical emergency, She shouldn't give in because of blue balls, extreme frustration or even a desperate feeling to want to cum... You NEVER need to cum, you only want to and it's
always her decision, not yours. Remember that.
If she wants sex and unlocks you for it, then that's her taking what she wants and that's the difference.
As for your chaffing, I used to have that problem myself until I switched to rings that were rounded and without any edges on them. That solved the problem for me. Let me show you an example of what I'm talking about.
This is the "Hands Off!" cage with non-rounded rings:
This is the "Lock Down" cage with rounded rings:
This Micro Cage has a rounded "Ergonomic" ring, which is curved inward:
So, you can see the non-rounded rings have edges which can allow the rings to dig into your skin and that's the main cause of chaffing... This also applies to plastic cages as well. Also, you must ensure you're ring size is proper and neither moving around (loose) nor restricting blood flow (too tight). You want your ring to be snug, but not tight. There are various procedures to determine your ring size, but here is the most popular method:
1) have your cage on and locked
2) soap up your index finger
3) insert your finger between the ring and the underside of your ball sack
A) You should get your first knuckle to reach the ring and no further.
B) If you can't get your first knuckle to reach the ring, it's too tight and you need a larger ring
C) If you can get your first knuckle past the ring, it's too loose and you need a smaller ring
Now, as for your Blue Balls dilemma, again Blue Balls are inevitable and are an important part of the experience. You have a couple of options to deal with this... My favorite way to deal with it is to get an elastic chastity support strap to hold your cage firm, but not tight, in place so your balls don't hang low and they'll be out of the way. Try this while working out at least a couple times to see how well it works out, or not.
https://www.amazon.com/Chastity-Accessories-Auxiliary-Adjustable-Underwear/dp/B0CLZXD39R
This entire journey, while fun and kinky, is all Trial & Error and you won't find your ideal setup for the long term until you try different things and make note of what works and what doesn't. It took me many months to properly identify what things work best together for me and the result is, I've been locked up 24/7 for 8 months, save for weekly cock cleaning, with no issues at all. Just pure frustration from only being able to cum in my cage without being able to even touch my cock. Truly T&D Heaven for me.