Hi, my 5 y/o son has an infected fingertip. I can not see any pus, but it is red and swollen all around the nail and down to the top knuckle. He has had this before, but I have been able to find something to drain in the past. One time it was on his toe, and we had to go to the clinic to have it drained. My question is, how long can I leave this without being seen? What can the doctor do if there is nothing visible to drain?