What should I do concerning my wife who traveled without my consent and without a mahram for medical treatment, and should I abandon her?

If a wife travels without her husband's permission and without a mahram, she is disobedient, sinful, and rebellious (nashiz). The treatment for nushuz has steps, and abandonment is not the first among them, and it has legal guidelines. The husband is advised to act with wisdom and to consult rational people, and not to resort to divorce unless its benefit outweighs the harm, such as when cohabitation becomes impossible or out of fear of wronging the wife. In such cases, separation with kindness is better, as it removes the harm of continuing the marriage in this situation.