Hi and welcome to Healthcare magic.Thank you for the query.
This is commonly felt after CS and it can be small wound infection
or burned-in suture nfection. ALso, sometimes fibromas or small hematomas may persist for some time after such incisions
. YOu should wait and see will there be progression or pain ,redness
and pus formation. If ,not then you dont have to be worried.
Wish you good health. Reagrds