Post Tummy Tuck Bulging Pubic area with dimple from drain

I'm about five weeks post tummy tuck and I feel very lumpy. I have a deep dimple in my public area from the drain tube, my pubic region protrudes much father than my stomach (maybe because compression garment ends there). My question are, how common is this and when will it subside? Are patients ever left with "lumpy" results? Also, are you SURE new stretch marks can't be created with a tummy tuck? I've see answers claiming no, but are there any pre-test/post-test studies that you can point to?

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