I caught a cold a few days ago and I've been coughing a lot. It's causing pain in the lower part of my abdomen near my c-section scar. Is it normal for it to still be painful after 10 years? Could it potentially reopen from the inside?

It is not normal for the area of a c-section scar to be painful after 10 years. It would be best to consult a doctor, preferably a gynecologist, to determine the cause of the pain and address any potential concerns of the scar reopening internally.