Question: what are the symptoms or signs that your third eye is opening?
Answer: An Increasing Pressure in Your Head. This is the most common symptom of an open third eye; you will begin to feel a growing pressure between your eyebrows. ... 
Foresight. ... 
Sensitivity to Light. ... 
Gradual Changes. ... 
Manifestation of Powers. ... 
Seeing Beyond the Obvious. ... 
Heightened Sense of the Self.