japanese sencha is it normal or am i allergic

[ODANOBUNAGA]

is it normal that you mouth like get really dry from drinking sencha or could it be allergic reaction?? well i read its normal because of the caffeine but i think that only applies to black tea or does it apply to sencha as well???

 

[zoomingjapan]

I never really paid attention to it, but I doubt it's an allergic reaction.