Aren't they suppose to stitch, drain hole from the Tummy Tuck after they pull it out of the body?

We do not stitch the drain holes closed because that would actually increase your chance of infection.  The heal by secondary intention in about 4-5 days

Thank you for your question.  It is normal to remove the drain and leave the hole open.  I usually put a little antibiotic ointment on it and gauze after the removal of the drain.  They do heal and close on there own nicely. Follow your Plastic Surgeons wound care instructions.  If you have concerns I would recommend following up with your plastic surgeon.  Best of Luck.