It is normal to experience itching during the healing process. Be careful about scratching because you will want to avoid infection. If you have itching and numbness, it is possible to hurt yourself from scratching. Some mothers find that holding something tightly over their scar can help reduce the itching sensation.
The itching can also be from the area of pubic hair that was shaved just before the surgery. If after your pubic hair grows back you still have itching, it may simply be from healing.