I've had this problem, it would also happen during vibrations or RTR.
i don't speak a lot, so it makes sense that it'd come up during those things.
http://www.angelfire.com/empire/serpentis666/Open_Blocked_Chakras.html said:
Strong chakras can absorb energy. Weak chakras that are blocked are depleted and unable to attract and absorb energy on their own. Weak and blocked areas create diseases associated with the particular chakra and visa-versa- diseases create the weak chakra.
These aren't diseases but more so problems, if you've got a speech/thyroid problem or soar throat that may weaken the chakra or be caused by a weak chakra, however i'm not really sure on this.
Further more it could possible be weakened by others, i know i've always had problems speaking/expressing myself around my parents however when i'm not in the house and they're not around i speak a lot and i say what i want. or this could be a symptom of having a weak throat chakra.
They're most likely sap energy from my throat chakra weakening it as a result and causing the stinging pain i have.