Hi... Suddenly, out of the blue, I went to shave my armpits and noticed an excessive amount of hair. I never had this much hair before; when I wasn't taking any hormones, I always had very little hair in my armpits. However, now, taking estradiol and spironolactone, I've noticed about five times more hair than normal. It was shocking when I went to shave and saw the excessive amount... I even asked myself at the time: Am I dreaming? Is this normal during the transition? To me, the amount of hair should decrease, not increase. I've noticed this is the only place on my body where I've noticed an increase.

There's two possible ways on how this usually happens. One is elevated estrogen causing your body trying to keep the balance and T levels go much higher for a while. But this only lasts for maybe few weeks usually, if your estrogens are high enough and blocker works, this shouldn't be a problem. 

Second possibility is genetics. Your body hair pattern will switch to female one and how you get it depends on genetics, you might have a whole lot of inherited traits which only show up when your body is running on female hormone dominance. Are the ladies in your family thick in the arm pits? Body hair very centered in certain spots? This might be your genetics as your body is literally becoming a female version of you. We all have the genetic "code" for male and female development dictated mostly by hormones and once you swap your body knows exactly what to do and that might mean less/more body hair in a different pattern. 

For example, I lost about 90% of all body hair I used to have, tons on my back, chest, thighs etc., all that is gone and there's transparent peach fuzz left. At the same time my pubic hair turned from messy explosion of short coarse hair into well defined triangle of soft and extremely long hair and the amount absolutely went down, volume did not, if I don't trim I'm extremely hairy down there due to the sheer length of them. Armpits stayed largely the same, all hair growth considerably slowed down, especially facial hair (What's left of it has become slow growing really weakly attached so epilating/plucking is super easy.) 

I would say its very likely that you're exhibiting your genetics here, if this keeps going on, that is 100% the case. I'm getting it quite easy due to nordic genetics, but omg if I had south European or Balkans DNA I would be a female sasquatch. lol.

There's two possible ways on how this usually happens. One is elevated estrogen ...

Hi, thanks for your answer. In my family the women don't have too much hair on the body, so I think that it is the first thing that you said. I realy don't know if my estradiol is high, because I did my test 6 hours after take transdermal gel, and it shows very high, but I am trying to do a new test in other moment of the day to know if it is realy high. But it is probably the situation...