A slit in your forehead starts to open.
How do you tell your third eye is starting to open? What are the signs and symptoms that accompany it?
There is a lot of mist around the topic of the third eye.
I hope that I will clarify what you need to know.
Firstly, opening the third eye is usually followed by a set intention. If you've deliberately wanted to open it then you surely are on the right track.
One of the things that may happen is that you can connect with some of your psychic abilities that you were not aware before.
You might start seeing entities from other realms, pick up information that noone else can and can look magical for others.
We all have those psychic abilities burried deep in ourselves but thing is we don't pay attention to them.
That's why when you chose to open your third eye, you dig up all those spiritual powers you have and activate them.
Hope that answered your question.
I found this source to be reliable and useful.
If you really believe that stuff then look at this site. There are more sites online about it also.
I was at a New Age festival a few years ago, standing near a counter talking to a friend, when a youngish woman stopped to pay for a purchase. When she finished I said, "Can I touch your third eye?" She looked at me as though I was some sort of opportunist but, hey, it was that kind of environment, so she said, "OK".
I touched her forehead, somewhere about the middle, and said, "Your name is Dianne."
She was flabbergasted. "How did you do that?" she asked.
That's when I admitted that I'd seen her driver's licence when she took out her wallet.