Since when do you have pain?
How severe is the pain?
Do you have recent history of any abdominal strain or unaccustomed activity?
The scar tissue (and it is not only skin but deeper tissues like muscles and fascia) is not strong as normal tissue. It looks like that you have sprained these weak muscles by some activity. Just picking up the baby or carrying can cause this sprain. The treatment is rest to the body part, avoiding those activities which reproduce the pain, heating pad, anti-inflammatory analgesics like motrin, local analgesic spray or ointment.
Hope this helps you. Please don't hesitate to ask, if you have further questions.