The ruling on a woman going for medical treatment without her husband's consent

Question:
A woman lives in one of the villages, and she is afflicted with several chronic illnesses; therefore, she needs continuous treatment; so she was forced to leave her husband alone in the village, where there is no suitable treatment for her condition, and she moved to her children in one of the large cities to provide suitable treatment for her, and her husband was not pleased with her moving away from him, so is there any blame on her for that? Knowing that he does not fulfill his duty toward her, her financial maintenance, and the like, and he often defies her, and problems constantly occur between them, so is there any sin on her for leaving him?

Answer:
What appears—and Allah knows best—is that if it is a severe illness, she has a legitimate religious excuse to go to the hospital, and her going to her children so that they take her to the hospital and treat her.
As for if he is patient enough to fulfill the duty, she stays with him so that he fulfills the duty, but if it becomes impossible, and he does not care about her, then she has the right to move for treatment to her children, or to her brothers; because this is a harm, and the Prophet (peace and blessings be upon him) said: So if he harms her and causes her pain, he has no right to do so.