Hi, Welcome to Health care magic forum.
It appears to be the stitch material with a built up connective tissue
, Or it may be the surgical hernia
.Some times it may be the ganglion
of the scar tissue.
Any how it is advesible to consult your surgeon for diagnosis.You may need to have a M.R.I. for diagnosis.
Take more of green leafy vegetables, pulses, sprouts,and
protein rich foods to hasten the recovery.
Wishing for a quick and complete recovery. Thank you.