Is my knee infected? i fell on the street yesterday, and badly scraped my knee. it is painful, need to take painkillers almost 3-4 times a day, hurts when i walk, climb stairs. this pic is one day after i fell. i have been cleaning it, applying antibiotic

Based : Based on the photo and your description, the knee is not infected. You should continue to gently cleanse the knee with soap and water on a daily basis. You should continue to apply neoporin or other antibiotic cream and a clean sterile bandage such as a bandaide. Your knee is healing fine. If the area around the knee becomes angry red, hot to the touch and more painful, you should see your doctor as it may be becoming infected. You should also see your doctor if you develop a temperature over 100.4 f (38 c) or if you develop shaking chills.