What is the ruling on intentionally collecting and swallowing nasal discharge from the nose, and is it considered phlegm? What is the ruling on one who did so out of ignorance, and what is the effect of that on his previous fasts, and what are the implications? Does the ruling differ if it was done out of forgetfulness or if it was expelled without swallowing?

If phlegm or sputum reaches the mouth and is swallowed intentionally, scholars have differed as to whether it breaks the fast of the fasting person or not. Those who say it breaks the fast consider their fast invalidated, while those who say it does not break the fast consider their fast valid. As for one who swallowed it forgetfully or out of ignorance, their fast is valid according to the preponderant opinion. Therefore, your previous fast is valid, and you should avoid swallowing it in the future. However, drawing phlegm into the mouth and then expelling it carries no fault.