Numb Tongue?

[toasterburn]

I've just bought a bag of Adagio's Black Tea with Hibiscus in it; I've had a cup every night this week and loved it. Well tonight I got into a conversation and overstepped it a bit, but it tasted fine so I drank it anyway. About half way through the cup, I noticed my tongue had gone very numb; numb enough where I could bite it and not feel it. I stopped drinking, and feeling slowly returned. This is the first time it's happened. Any idea what caused it?

[heliospace]

A minor stroke? Too much caffeine? I'd consult a doctor before consulting the Internet. Cheers!

[entropyembrace]

it was most likely just too astringent...oversteeped black tea with hibiscus would be very astringent