According to the purity laws of the Old Testament (Leviticus 15:25-27), a person with an issue of blood is to remain quarantined. Also, "Whoever touches those things shall be unclean; he shall wash his clothes and bathe in water, and be unclean until evening" (verse 27).
During the poor woman's ordeal, her incurable disease had drained her, not only of her energy, but also of all her money. Her quest to find a cure from the physicians had solved nothing; in fact, she had gotten worse under their care (interestingly, in Luke's account, he—a physician—omits the phrase, "but rather grew worse"). Her condition, then, was both painful and distressing. The nature of her illness, its prolonged duration, and her fruitless reliance on physicians cost her all her money for expensive remedies, making her a hopeless case.
Nevertheless, she is a determined woman who has faith that she can find relief merely by touching Jesus. In her desperation, she displays considerable faith by risking the consequences of breaking a sacred rule in willfully coming into contact with other people.
Martin G. Collins
The Miracles of Jesus Christ: Healing a Woman With a Flow of Blood