Thank you for your question. Typically Neosporin or other antibiotic ointments are used during the first week or 2 after surgery but then discontinued.The problem with ointments used for prolonged times over incisions is that the ointments occlude the skin and prevent the evaporation of normal moisture and skin oils. This can result in what we call wound maceration or softening and interference with healing of the incision.Of course follow the advice of your plastic surgeon, but in my practice topical antibiotic ointments are discontinued after the first week to 10 days unless there is an infection or some other problem that requires their use.
I believe that prolonged use of Neosporin can cause a skin rash or pimples around the area.I would use Neosporin for a week, and then change to Mupirocin if the wound is not healed. At six weeks, your incisions should be healed. Occasionally there is delayed healing at the junction of the inverted "T", and this may require months of healing.