How Can I Minimize Scars From Breast Reduction Surgery?

I had a breast reduction over about 1 year 6 months now. My surgeon used anchor technique. Everything healed pretty well but my scars under my breast (on both sides close to underarms) are getting thicker, keloid like and are painful. I am not able to sleep on my sides because of the pain, and wearing a bra hurts as well. Do I need to consult the doctor for this? I have been applying Mederma but it hasn't helped. Any input will be helpful.