53, 127lbs, c-sections, hard knots inside tummy tuck incision, what can be done about it? (Photos)

An examination is needed to be certain. Keloids do not develop internally, but are from the skin. However, you may have a suture granuloma with excess scar tissue is forming around a stitch (not a keloid) or could be an area of fat necrosis which will feel hard or could be a permanent stitch's knot. The treatment is the same for all three--cut out the hard knot. Steroid injections probably will not be helpful and could thin fat in the area and leave a depression.

Dear Joyjoy15,
I understand your concern. Based on your description, there is a chance that you feel sutures. However, without a proper assessment, it would be difficult to determine what went wrong. It is best that you visit your plastic surgeon for further assessment or ask for a second opinion. Only after a thorough examination, you can get proper recommendations and advice.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Hi. The hard knots under the scar may be due to the fact that you had "dead skin" that needed to heal slowly, or it can be due to retained sutures from the surgery. Steroid injection isn't likely to fully correct either problem. Usually, the most successful treatment is to remove the area but cutting out the hard part and then reclosing it with stitches. This can be done with just local anesthesia in the office, so it's not a big deal. Talk to your surgeon about this option to see if he/she feels you are healed enough to try it. Best of luck!