I Had a Breast Augmentation 7 Weeks Ago and Now I Have Harden and Lumps Under the Incision, Normal?

This is part of the normal healing process. Where the breast tissue and or skin is sutured together ther's a little firmness called the healing ridge. This will flatten and soften over several weeks as you heal. Depending on the sutures used or even on the individual, the body can react more to the sutures and create small lumps called suture granulomas.

There are many things that can cause a breast lump after a breast augmentation. Since you are thin and the implant was placed above the muscle you may just be feeling the edge of the implant. This may also be a totally unrelated breast mass or cyst. Best to check with your plastic surgeon and have this area examined.