Ruling 126 — Purification (Ṭahārah)

If thick phlegm from the nose or throat contains blood, the part containing blood is impure and the rest is pure. Therefore, if the phlegm touches the outer mouth or nose, the area about which one is certain the impure phlegm touched is impure, and the area about which one is doubtful whether the impure phlegm touched or not is pure.