If you decide to go to a stylist, make sure you search for a lot of information about texturizers and ask your stylist a LOT of questions. Four years ago I went to a stylist to get a texturizer. When I told her that my scalp was burning and she said, "Oh, just let it sit a little longer so it can take," I just assumed she knew what she was doing. But after my hair was burned off at the nape and my skin was stinging red, I realized that she didn't. Not only that, but my hair was almost straight and was thin. To this day I believe she did that intentionally.
Anyway, I know more today about texturizers than I did back then. This board has certainly taught me a lot. When I decided to texturize earlier this year, I decided to risk applying it myself than to go to a hairdresser. When I did it, my scalp didn't burn at all and my hair hasn't fallen out excessively.
But like I said before, make sure you do a lot of research on what texturizers are supposed to do.
