It is about 2.5 months after my breast reduction, but wound is still open on right side, normal?

Wound healing problems after breast reduction are amazing common. The most likely place they occur is just where your wound is, at the bottom of the "T" incision. The most appropriate course of action is daily dressing changes and allowing it to heal on its own. Trying to operate on this will only result in more problems. Be patient and realize it will eventually heal. Your surgeon is doing the right thing. He may need to change what dressings you are doing which is why he likes to see you often.

It looks like your wound is healing in secondarily, and usually with local wound care it goes on to heal. It is very important to follow closely with your surgeon.