Suppose right now your right hand starts acting funny – it beats your left hand, punch on your own face, pokes you in the eye and pops around. Would you say this is an ailment?
For sure, this is one.
That is exactly what mind is also doing. It pops around, hurts, pokes you and makes you suffer. Specially if someone is addicted to bad habit e.g. smoke or drinks and there are many form of addictions…
Regular practice of Yog Sadhana will help to come out of addictions, so that mind can do what it is designed to do and you will become free from addictions.
Otherwise the sickness in the mind will manifest in physical body.