Oh no. I've used the tanning salon and have no idea how to go back to normal. Someone, please, help me?

When you go to your wardrobe, click "Avatar" when you can change your nose, mouth eyes and what not, it'll let you pick a new base which should cancel out the tanning salon base.

Personal > Wardrobe > Avatar Choose a skin from there. It should go back to normal; it did for me.