A moving story of miraculous healing from the pen of St. Augustine (City of God, book 22, chapter 8). It all sounds surprisingly contemporary. Read the whole chapter because Augustine describe many more miracles in detail.
Note that St. Augustine was "extremely indignant" and felt that the woman who was healed should be reprimanded for not sharing the story of this incredible blessing with her friends and in her city. This was about giving God glory, not false humility. A sign of the cross made by a newly baptized woman and Innocentia's faith and obedience to a word of God in a dream was the door to a miracle. Augustine says that in two years, more than 70 cases of miraculous healing were recorded in his diocese.
"In the same city of Carthage lived Innocentia, a very devout woman of the highest rank in the state. She had cancer in one of her breasts, a disease which, as physicians say, is incurable. Ordinarily, therefore, they either amputated, and so separate from the body the member on which the disease has seized, or, that the patient's life may be prolonged a little, though death is inevitable even if somewhat delayed, they abandon all remedies, following, as they say, the advice of Hippocrates.
This the lady we speak of had been advised to by a skillful physician, who was intimate with her family; and she betook herself to God alone by prayer. On the approach of Easter, she was instructed in a dream to wait for the first woman that came out from the baptistery after being baptized, and to ask her to make the sign of Christ upon her sore. She did so, and was immediately cured.
The physician who had advised her to apply no remedy if she wished to live a little longer, when he had examined her after this, and found that she who, on his former examination, was afflicted with that disease was now perfectly cured, eagerly asked her what remedy she had used, anxious, as we may well believe, to discover the drug which should defeat the decision of Hippocrates. But when she told him what had happened, he is said to have replied, with religious politeness, though with a contemptuous tone, and an expression which made her fear he would utter some blasphemy against Christ, I thought you would make some great discovery to me. She, shuddering at his indifference, quickly replied, What great thing was it for Christ to heal a cancer, who raised one who had been four days dead?
When, therefore, I had heard this, I was extremely indignant that so great a miracle wrought in that well-known city, and on a person who was certainly not obscure, should not be divulged, and I considered that she should be spoken to, if not reprimanded on this score. And when she replied to me that she had not kept silence on the subject, I asked the women with whom she was best acquainted whether they had ever heard of this before. They told me they knew nothing of it. See, I said, what your not keeping silence amounts to, since not even those who are so familiar with you know of it. And as I had only briefly heard the story, I made her tell how the whole thing happened, from beginning to end, while the other women listened in great astonishment, and glorified God."