Hello and welcome to HCM - I would be happy to help you today!
You should only be worried if the lump becomes exquisitely tender. If it is a hernia
, then bowel can get caught in the defect and this would be VERY painful.
It is extremely uncommon to get a hernia from a C/S incision. This is related to its orientation and lack of tension on the incision as it heals (assuming that you had an incision that went from 'side-to-side'). The possibilites include:
1. A hernia (I will say this is unlikely)
2. Non-resorbed suture (sometimes this produces a small lump)
3. Scar tissue
The fact that you have a visit scheduled with a general incision is great. Keep your appointment and good luck!!