I went to ER for complaints of cyst on my back. Was afraid of an abscess. Had become irritated from everyone squeezing and prodding it. ER doctor said she thought pain was just from everyone disturbing it, however she did ultrasound and said she thought there may be a little fluid there. She numbed area and did a small incision. Nothing came out, so she said there was no fluid, however, I need to watch area because of the scalpel slice. She placed me on bactrim for three days. Today is the last day of the Bactrim, however, wound is still red and very very sore. She wants to place me on Bactrim for an additional five days. Should I be concerned that the area is still so sore and red or is this part of the healing process of the wound. There is no discharge and it feels like there may be a small lump near the cyst, which the ER doctor said was probably from the wound being irritated. It is between my shoulder blades and is in a bad spot, which sometimes gets bumped.