Mythbuster: Will Your Hair Grow Back Thicker After Removing

Nope! Most hair does not grow back any thicker - or thinner - than before you removed it. There are, however, 2 exceptions to this rule:

1. When hair grows naturally, it usually has a tapered end which is narrower than the rest of the shaft. This can make the hair appear thinner or finer than it actually is, especially if the shaft is very short. So if the hair is cut straight across - for instance, using a razor - the end is no longer tapered and the hair can look thicker. This is an optical illusion. It’s also why people often think waxed hair grows back thinner, not thicker. But that’s largely an illusion, too. 
2. Sometimes people will start removing hair from a certain body part before the hair itself changes. For instance, pubic hair grows in thicker, coarser, and curlier than most hair on the rest of the body and it spreads out over a bigger and bigger area through the teen years, sometimes even into the early 20s. So if it feels like hair has thickened after you wax it off, the most likely reason is that the hair in that spot was going to get thicker anyhow, whether or not you waxed.