Disease Prediction using Decision Tree...How it works?

[Hafsa469]

Hi! Can you please tell me the basic working of a tree that on which bases it is predicting the diseases because in mostly cases the irrelevant diseases are predicted?
Like for high_fever it is pedicting Arthritis while high fever is not in its symptoms

[Siddharth-L]

yes the predictions are irrelevant and so working of tree can be explianed !!