This past fall I had a bone infection in my foot.  After three rounds of antibiotics and  two months later,my foot was still infected. The doctors were discussing putting a pic line in me to insert antibiotics. 

At a family gathering I was explaining to my sister-in-law the story of Lourdes.  She then brought into the room a flask of holy water that she said her daughter had given her on a trip to Lourdes. I asked her if I could use some of it to pray for a healing for my foot.  It was a small amount, so I drove up to the Grotto where I often go to pray and continued to pour water from the Grotto on the area of infection each morning while praying the prayer to Our Lady of Lourdes for healing.  A month later, my foot was healed. 

I believe it was the water from the Grotto that healed me and my sister-in-law (a non Catholic) was in tears when I told her of my healing.