Hello, my husband is 45 years old. 3 days ago, he noticed that is knee has been hurting. His knee is swollen, red, warm to touch, seems like there is fluid around the knee. He doesn t remember bumping it on anything. A few weeks ago he did get cut on a blade, a food processor blade when he was doing dishes. He got cut on his finger and it was pretty deep. It has healed up nicely though. He does feel sluggish and he does have a slight fever. What do you suggest?