Is it ok to have a tummy tuck if you have a hiatal hernia and peptic ulcer?

A tummy tuck tightens
the abdominal wall, including the fascia, which increases your abdominal
pressure.  This will make your hiatal
hernia worse and may cause more problems. 
I would not recommend a tummy tuck until the hiatal hernia and peptic
ulcer have been treated.  Warmest Regards,Gary Horndeski, M.D.

It will be tough for anybody to predict the effect the tummy tuck will have on your repaired hiatal hernia, but if you've had good control of reflux and acid and have a normal endoscopy, the tummy tuck procedure could be modified so these things won't get worse.