There may be too much energy running through your third eye chakra. This can happen when you begin using your intuition or open up your clairvoyance.
It's also the centre of spiritual truth and wisdom, so there can be changes in this energy centre when you awaken your own spiritual wisdom.
If you wanted to rebalance it, you could place amethyst on your third eye and intend for it to rebalance the energy there.
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