So, I've had some difficult acne on my forehead that once flared up, was very hard to get rid of. The testosterone is a big red flag when it comes to "what changed?" in your life, but other things can make it worse.
Age, for one. I suddenly had breakouts right around the time I turned 45, never had them before, but guess what age is a factor.
Next is diet. Acne is an inflammation response that loves to go into overdrive when I eat refined sugar, refined flour, beer, etc. I cut out sugar and grains and my skin cleared up very quickly despite starting TRT. My doctor thought being on TRT would make all my acne worse, since I was worried about that, but I cleared it up with diet along with some regular application of Nizoral shampoo, which seemed to help also.
I was going to add that I've been shaving my head and chest for decades. It's super easy, just have your wife shave your back once every week or so. Waxing, yeesh, that gives me the willies. Haha.