Can all physical ailments be traced to some disorder in the mind as their ultimate source? If so, what kind of mental disorder would produce such an ailment as, for example, prickly heat or sore throat?
There are as many reasons for an illness as there are people who fall ill; the explanation is different in each case. If you ask me, “Why have I this ailment or that?” I can look and tell you the reason, but there is no general rule.
The ailments of the body are not always the outcome of a mental disorder, disharmony or wrong movement. The source of the malady may be something in the mind, it may be something in the vital; or it may be something more or less purely physical, as in illnesses that arise from an outer contact. Again, the disturbance may be the result of a movement in the Yoga, and in that case too there is a multitude of possible causes.
The force that comes down into one who is doing Yoga and helps him in his transformation, acts along many different lines and its results vary according to the nature that receives it and the work to be done. First of all, it hastens the transformation of all in the being that is ready to be transformed. If he is open and receptive in his mind, the mind, touched by the power of Yoga, begins to change and progress swiftly. There may be the same rapidity of change in the vital consciousness if that is ready, or even in the body. But in the body the transforming power of Yoga is operative only to a certain degree; for the receptivity of the body is limited. The most material plane of the universe is still in a condition in which receptivity is mixed with a large amount of resistance. But rapid progress in one part of the being which is not followed by an equivalent progress in other parts produces a disharmony in the nature, a dislocation somewhere; and wherever or whenever this dislocation occurs, it can translate itself into an illness. The nature of the illness depends upon the nature of the dislocation. One kind of disharmony affects the mind and the disturbance it produces may lead even as far as insanity; another kind affects the body and may show itself as fever or prickly heat or any other greater or minor disorder.
[The Mother: CWM 3]