What is the ruling on swallowing tonsil secretions while fasting?

The fasting person is not harmed by swallowing secretions that come out of the mouth, nose, or chest, such as tonsil secretions, phlegm, and mucus, if this happens unintentionally or due to an overwhelming urge. Intentionally swallowing them also does not harm, according to a group of scholars, and this is the most preponderant and authoritative opinion.