All depends in depth
Deep 2nd acts more like a 3rd, superficial 2nd acts more like a 1st. It all depends on depth. Superficial may not scar at all, deep may scar significantly and may need to be excised and grafted. If the area is contracting and causing disfigurement, pain, or limiting mobility see a plastic surgeon. If it has healed and worried about aesthetics- sunblock daily, give at least 1 yr.