From National Catholic Register:
Oct. 1 is the feast of St. Thérèse of Lisieux. Oct. 7 is the feast of Our Lady of the Rosary, orignally named Our Lady of Victory. Together, they remind us of the time Our Blessed Mother cured 10-year old Thérèse Martin of a life-threatening sickness and how Our Lady also got the title of Our Lady of the Smile.
An event on another day that month — Oct. 2, 1882 — that hastened the incurable physical and mental torments young Thérèse began to suffer. The problem began shortly she saw her sister Pauline enter the Carmelite monastery on that day. Pauline had been her second mother, raising her after their mother (now St.) Marie-Azelie died when Thérèse was only 4 years old. Constant headaches plagued Thérèse. These became more acute by winter. Worse followed. Shivering, convulsions, hallucinations, pains, lack of appetite. They subsided for one day, the day her sister Pauline received her habit at Carmel.