Can i start smoking after umbilical hernia surgery?

If you have stopped during recovery period try quitting altogether. Smoking is bad for your health . But yes you can if you want to.

Can or should and when ? Smoking puts nicotine into your system which has an effect on the tiny blood vessels involved in healing. It triggers a reduction in blood flow in the site while the nicotine is in your system. That slows the healing process. If you must smoke, I would give your body the 6 weeks it needs to heal before resuming.