Small opening on tummy tuck incision. Should I put a steri strip on it or let it open? (Photo)

Sorry to hear about the complication you have experienced. These types of superficial separations or wounds can occur, and sometimes may “look worse, before it looks better”. Keep the area clean/covered with a sterile dressing; no need to steri strip it.In my opinion, the most important “factor” involved with successful treatment of the complication will be close follow-up with your plastic surgeon. He/she will be in the best position to monitor situation carefully. Infections should be ruled out and “foreign bodies” such as sutures that may prevent quick healing may be removed. The open wound should go on to heal over the course of the next several weeks, hopefully without long-term sequelae. Concentrate on a well-balanced ( good protein source) diet. Best wishes.

Thank you for your pictures.  I would allow this to heal spontaneously.  Good local wound care will minimize the risk of infection.  You need to see your plastic surgeon to get definitive instructions on wound care.