De-Identification and Healing
An important aspect of yoga, more than the very popular and pervasive Asanas and Pranayama, is de-identification or overcoming the name-form identification or ego. Ego is supplied by the mind, which gives a feeling of separateness from others leading to a limited self (Ahamkar in Sanskrit).
Ego is a dis-ease, and when the ego disappears, the 'wound' in you disappears and you are healed, you are the whole.
The shift from Separateness to Wholeness manifests experientially through constant meditation practice.
Though yoga's intent, like in Siddha Samadhi Yoga program, is spiritual, that is to instill oneness and experiencing unboundedness, healing of psychosomatic diseases happens as a byproduct, which makes the program, very popular.