It depends on your skin type.
if your skin is sensitive, when you first use it it may cause a little bit of redness just because of how strong the tea tree oil is. it gives a tingly sensation and that can be an irritation to sensitive skin.
But if you've never had a problem with sensitive skin, it shouldn't cause any extra redness and I personally do think it helps with evening out your skin tone after you've used it in your normal routine for a while.
it really is a great toner!