Shaykh Ibn Uthaymeen was asked:
What is the ruling on spitting into a tissue while facing the Qiblah in prayer?
“There is no harm in that”*
[Kanz uth-Thameen Fi Su’alaat Ibn Saneed no. 141 pg. 34]
* The author said: “that is also the opinion of Shaikh Bin Baz rahimahullah”
Faisal Ibn Abdul Qaadir Ibn Hassan