This is my true story: I have cured Infected Sinus by drinking small shots of Apple Cider Vinegar for several days in a row. I take a little cup, put in one or two tablespoons of the vinegar, and add about quarter cup of water. (ratio about 1:3 or 1:4) Then, I drink it. Three or four times a day. For 4 or 5 days in a row. My sinus cleared up. I have waited few days to see if this remedy is really real... and I'm convinced. But one warning: the vinegar will "clean" your tongue so thoroughly that it will be sore, the taste buds will be in shock. Better to drink your little cups with a straw.