An interesting fact...

Did you know that shaving does not make your hair grow back thicker, stronger, faster or any other "er". Numerous studies going all the way back to the 1920's prove that shaving has absolutly no effect whatsoever on your hair growth rate.

Visible hair is dead tissue. Cutting off dead tissue could not stimulate the hair follicle to grow any more than if you caressed that hair with a 10 dollar bill. The razor is not some magic wand that waved over a hair follicle produces some unique reaction.

Shaving doesn't cause thicker hair growth. It LOOKS like the hair is thicker, especially when it's short stubble, because its flat at the end not tapered (so each hair is a flat-ended cylindrical shape rather than a long thin cone). Waxing probably doesn't have the same effect as it takes the hair right out, so the follicle is starting again with a new, tapered hair.

BUT waxing will change the thickness of the hair over time...

When you wax, you are ripping the hair out of its follicle. Depending on the growth stage the hair is in (every hair is at a different stage at the same time) then you are going to destroy the follicle and that follicle will no longer produce hair. It takes a long time to see a big difference in the amount of hair growth because of the amount of hair follicles over the body, but over time you will notice less growth than when you start.