bacterial infection
"I started on Doxycyline a few days a go after a week of headaches and painful sinuses. I was running a low grade fever and coughing up phlem like crazy. Every part of my body hurt from the fever. Once starting doxy taken with a full glass of water, no vitamins and no laying down for 30 minutes I started to get better. I had a few graham crackers so I didn't take it totally on a empty stomach. My fever broke and the headaches are gone. I had many sinus infections until having surgery on them for a drainage issue 20 years ago. I never had another one until this year and it's a doozy. Doxycycline is the only thing that works for me on these sinus infections."