Back surgery 6/3. 2 weeks later an infection. taking picc line antibiotic for 2 weeks with small draining area. now draining area is getting larger??

Close follow up : Unfortunately wound infections can occur with surgery. If it is a deep infection, Most back surgery infections require a "wound washout", where the surgeon can culture the wound to identify the correct bacteria and wash out as much of the infection as possible. Some infections can be more challenging and require multiple wound washouts. Close follow up with your surgeon is a must!

See your doc: I presume drainage is clear yellow or slightly bloody and not pus. This is normal. sometimes tissue juice collects under the skin after surgey and drains out through a path of least resistance, in this case a small opening. I would have your surgeon look at the area on follow up early this week. Take comfort this does not sound to be alarming.

Infection: If the area is getting larger you need to see your infectious disease doctor.