I developed a severe swelling on the left side of my face three days ago. Saw doctor yesterday (two days later), was prescribed augmentin forte (with repeat) and nurofen, and started on these immediately. The diagnosis was an infected cyst beside my nose, an area which is very hard to touch and spreading upward. The swelling was worse this morning and has reached my jawline. My top gum on the same side is rigid and angry looking and I've just noticed a small head of pus in the gum over my eyetooth. I was warned that headache, fever and vision problems needed hospital care. The question is how long does it take for the above treatment to start working? And has the infection also caused a dental abscess? My face is very painful.