ANSWER:

If it goes from your nose up your nostrils and you swallow that, this has no impact on your fasting. 

But if it comes out of your nose and from there it enters your mouth and you swallow that, this breaks your fasting as if you are eating or drinking.

QUESTION: What it is the ruling of swallowing plegm that comes from nose does it affect my fast or salat if i swallow it i read if we swallow it from our mouth it invalidates fast and salat but can we intentionally swallow it from our nose directly to throat without letting in in our mouth and whats the ruling on sptting during salah likeif the phlemg from our nose enters the nose