Areola incision scar suddenly thicker, slightly red and painful (Photo)

Thank you for your photograph and your questions.  Based on your picture your incision does not look infected, but always best to look out for the hallmark signs: increasing pain, swelling, redness, or drainage of thick white discharge.  Your redness appears to be your body trying to heal the incision, and breaking down the sutures placed underneath the skin.  Best to keep your incision clean and dry, and inform your surgeon of any new changes that may develop, so that they can address any issues before they become a possible problem.  

Thank you for your question.  I would follow-up with your surgeon.  Antibiotics may be a consideration if your surgeon feels an infection is brewing.  They may also feel for sutures that may be inflammed or ready to spit through your incision.

Hello, your pictures looks like you recently had surgery. If this is accurate, then infection and healing issues need to be addressed asap by your surgeon. Redness, swelling, tenderness, induration "thickening" of the area all can be signs of infection. I would see your surgeon soon.