What Causes Scabbing On An Old Surgical Incision?

I have a e year old incision that has never healed properly..is hasa scab, which will flake off,then make a new one... it is on my legjust abovethe ankle. Afterthe surgery the leg became infected... had to haa second surgery as it got to the hardware in my ankle. They ran rests and found I had VRE and I hI hd to be isolate for six weeks during which titime I was give antibiotics to cure the infection. I hve had general discomfort ever since...swelling (worse in summer_ and some pain, but it is tolerable. able. When removing the scale, I have found stitches , along with the scaling tissue...two different occasions. TLast night it was painful even to hav my leg resting on the mattress...so I checkedthe leg this morning, and there is a hole in the incision. I am 84, legally blind , live alone, but afriend stopped by and I had her look at it. She confirmed t the hole and said she saw what appeared to be infection. I am wondering if I should go to the ER to have itchecked out. I thought to ask for advice here before I call my doctor.