Tummy looking bloated/swollen almost 4 months post op. (photo)

I had a full abdominalpalsty on 22 June 16. I was very pleased with the results post op. 3 + months on my tummy is looking bloated in the lower and upper abdomen. I had started to exercise 3 month post op but nothing strenuous. I have been doing the stationary bike for 30 mins and a few non core/abdominal exercises. Feeling disappointed. Can someone tell me what could be the problem?

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