My father is 91 years old ,his knee is inflated he lives in an old age home ,seen by the Dr ,he comes once every 2 weeks ,last month he treated him with antibiotics for 10 day 3 pills per day,the swelling was gone,but yesterday his knee swelled up again..Dr is on duty next Friday .Now my Dads left knee and the rest of his lower leg is swelling up ,he does not want to go to the emergency what do I do????by the way dr treated him for cellulitis . Thank you