I had a c-section 3 months ago. my incision has healed, but the scar itches like crazy every once in a while. what is the best thing to put on it?

Hard to say: First determine the cause of the itching: 1) if it is due to ingrown hairs, depilation may help. 2) if it is due to histamine or inflammation, antihistamines ( topical or oral) with corticosteroids may be useful. 3) if neurogenic, scar massage or topical capsacin may provide relief. 4) if caused by a suture reaction, removal may be indicated. If a topical allergic reaction, cessation of ointments.