Surgical glue embedded, causing redness on my incision line. Will it come off on it's own? (Photo)

it can be difficult to differentiate black from glue versus compromised skin from the photo. Please see your surgeron to examine the area.  Normally the gluwe does not cause the redness surroeunding the area. Good luck

Thank you for your question and photograph.  Surgical glue can be fairly sticky and can last for a much longer period of time than anticipated.  It is common that it would turn dark purple or even black. I would recommend you see your surgeon as at four weeks your incision is healed enough that they should be able to pull off the remaining glue without disrupting your incision. 

You need to see a physician in UK to have the black tissue/glue removed from the wound and possibly started on antibiotics.