Remember, THE INTERNET IS OUR BEST FRIEND for finding out about all sorts of ailments, so do google searches. And there are help-groups of people on the net who have the same symptoms of certain illnesses and they compare notes to advise each other.
The only time I've shrunk was when I had an underactive thyroid for a few years and lost a lot of weight.
As for erectile dysfunction, I had that about 10 years ago and my ladyfriend talked me into getting Viagra but that didn't help a bit so we split.
But I realise now that it was her fault for not turning me on in bed, she just lay there like a silent unmoving corpse and i felt like checking her pulse to see if she was still alive!
I now believe the biggest turn-on for a man is a turned-on woman..