Question
I have asthma, and during prayer, I cough and sometimes phlegm comes out. I use tissue to expel it while I am praying, and this is beyond my control. Does this invalidate my prayer?
Answer
I say, and with God's help: phlegm does not invalidate ablution nor does it invalidate prayer, so your prayer is valid, and this action of using tissue paper does not invalidate it; because it is necessary, and God knows best.