Umm Yahya from Algeria, it seems she has an issue with waswasa, but what a person finds in his throat, whether it is saliva or due to wudu, does this affect the fast?

Yes, there is a difference between what relates to saliva and what relates to wudu. As for saliva, we say: there is no problem for a person to swallow his saliva, even if he swallows it multiple times.

And anything that comes out from his body and he does not expel it, then it remains inside and he swallows it, there is leeway in this matter.

As for wudu, wudu is what he puts into his mouth, not what comes from his body.

So this is the water and the drinking that breaks the fast, whether it is, for example, from tasting food, like a woman who tastes her food to check, for example,

its cooking, its saltiness, or also its sweetness. We say then, if she swallows it intentionally, she has broken her fast. As for wudu.

So we say in this case, if a woman or a man intentionally rinses the mouth,

then intentionally swallows, it is like the one who drank.

But the limit of waswasa that I mentioned, is that some people have doubts.

They say, maybe this thing, or maybe the saliva I swallowed after my wudu had some water from the rinsing I did before, so we say in such a case: this is waswasa.

This is waswasa, even though we are certain that there remains some water in the mouth, even if a person does not spit out after rinsing, because water has no taste.

It remains, and it mixes with saliva and with the mouth, and maybe enters the stomach. This amount does not affect a person.

But what does affect is if a person intentionally holds a quantity of water and then swallows it, letting it enter his stomach.

This is what affects, but as for what remains after rinsing, like what is left under the tongue or in the throat, or what mixes with saliva and then enters the stomach, it does not harm a person. And Allah knows best.