Indeed, all illnesses are psychologically rooted, yet those causes manifest their consequences through matter: that is how we are genetically disposed towards certain conditions, or suffer illnesses in spite of not satisfying the "physical causes" theorized by materialistic science. For example, even having a perfect diet, a person can develop a serious heart condition. The cause is not in their food, but in their mechanical emotional habits.
I hope your mother recovers swiftly!
“Nothing is easier than self-deceit. For what each man wishes, that he also believes.” —Demosthenes
"Do not worry; cultivate the habit of being happy." —Samael Aun Weor