Secondary sexual characteristics (penis size, beard) in 26 y/o male w/ low testosterone - will they improve?

i'm a 26 year old male who suffered a head injury in 1999. i've had very low/low normal testosterone levels ever since. i've had many of the symptoms of this - erectile dysfunction, fatigue, limited facial hair, etc. what i want to know is this : i was 18 when i suffered the head injury and had not finished through puberty from what i could tell (could only grow a patchy beard. no one in my family can't grow one - father, both grandfathers, etc)... this is a bit different from my other concerns, but i'm wondering - will my penis get any larger with treatment? it is around 6 inches now, but i'm wondering - if my testosterone deficiency started before i finished through puberty, that means my penis probably didn't get to "full size" right? i have had some ED problems since my head injury, probably related to the lowered testosterone.
strange question, i know. and it's not nearly as important as the other problems of hypogonadism. i'm at 6" now which is respectable, but more is better.=)

oh, btw... the "treatment" i'm referring to is androgel, which i am starting this week...

starting at 2.5mg androgel applied daily and seeing how effective that is...

While I am not familiar with the drug you mention. I have looked into hormones and their effects on the body. I would guess that you should see improvement in hair growth, ED function,energy levels and emotional stability. I don't believe you will gain any more length or size of your penis. While testosterone has something to do with the size,the primary gland is the pituitary.

Well, good luck. Most women lie to men; size DOES matter!

I'm guessing the head injury affected the pituitary gland (if I have my glands right), which is responsible for telling your testicles to produce testosterone, which generates secondary sexual characteristics.

If you're not being treated by an endocrinologist, you certainly should be. You have some questions that lead me to believe if you were being treated by a hormone specialist, you'd already know the answers. I have no idea what your potential is for improvement at this stage, but this kind of expert would certainly know better than anyone here. Good luck.

Chances are, it won't get any bigger, even with treatment. Testosterone treatments may help you grow a beard, grow muscle mass, or even help with ED, but probably won't increase size. At 6-7 inches, you are in the acceptable average, at least as far as I have read. More is only better to a point. Ask women. They'll tell you that too big is not satisfaction. It's painful.

since a lot fo yoru questions are alrteady covered, al I wil add is that the average erect adult penis is just shy of 6 inches. Thsu your length is already fine.