Praise be to Allaah.
(may Allah have mercy on them) differed concerning the fasting person
swallowing phlegm or mucus: does it invalidate the fast or not? The correct
view is that it does not invalidate it, because it does not come under the
same heading as food and drink.
‘Uthaymeen (may Allah have mercy on him) said: When the scholars differ, the
reference point is the Qur’aan and Sunnah. If we are uncertain about a
matter, as to whether it invalidates the act of worship or does not, the
basic principle is that it does not invalidate it (unless there is evidence
to the contrary). Based on that, swallowing phlegm does not break the fast.
is that one should leave phlegm and avoid trying to bring it up to the mouth
from the throat. But if it comes up to the mouth, he should expel it,
whether he is fasting or not. With regard to putting drops in the ears and
whether that breaks the fast, that requires evidence that will be proof for
the individual before Allah, may He be glorified and exalted, concerning
breaking the fast.
End quote from
Majmoo‘ al-Fataawa, 19/356
He also said:
The more correct view is that phlegm does not break the fast even if it
reaches the mouth and one swallows it. It does not break the fast but one
should not swallow it, because the scholars forbade that, because it is
something off-putting and one should not swallow it.
End quote from
Liqa’ al-Baab al-Maftooh, no. 152
putting one’s finger in one’s ear, that definitely does not break the fast.
In fact, even if one puts drops or medicine in the ear and can taste it in
the throat, that does not invalidate the fast because there is no evidence
to suggest that the fast is invalidated by that.
information please see the answer to question no.
And Allah knows best.