I´m having a tongue ache

I have a question to more advanced learners of Spanish language;

I´m trying to pronounce “s” castellana and it´s ok, I can do it but I need to practise that and unfortunately after reading 1 page of A4 text my tounge is acheing from tiredness. :stuck_out_tongue:
Have you had the same symptom when you learned this? ^^
I´m wondering if it is possible to have sore muscles of the tongue…