When it started is a bit hazy. I know it's gotten particularly worse since I was about 23, but I didn't even know there was a name for the condition until about 3 years ago. I have the same experience when I tell other people about HH - most people are completely ignorant the condition.
I'm 14 and diagnosed with palmer/plantar when I was about 8, had it all my life though. My mum always said that I used to be drenched in sweat ,as a baby, after a nap in the pram. :/