Are prayers valid when phlegm is swallowed during prayer without the worshiper's knowledge?
The prayer is not invalidated by swallowing saliva, nor by swallowing phlegm according to some scholars, and this is a strong opinion. Therefore, your prayer is not invalidated by swallowing saliva with some phlegm. It is advisable to ignore obsessive thoughts and not pay attention to them.
Summarized from the full answer at Ftawy · reviewed Sep 2, 2026
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