Is drinking hot tea multiple times a day bad?

I've been feeling ill recently and have increased my consumption of hot black tea to about 5-6 cups a day. My step mother says it destroys the kidneys but I am not seeing anything about this online and she's not a doctor at all.
Answers

kelvin

no it isn't and she is wrong

Eva

Your stepmother is wrong.

k w

never heard of that either.....

.

nope, good for you in fact

Sukrit

Yes, caffeine is bad for you. May all be so well.

Alexander

Caffeine-free herbal tea would be better for you.