Is it safe to use my infrared sauna one week post IPL now and will it help with healing?

I would not recommend the use of a sauna post IPL. Heat causes the dilatation, or opening up of the veins, which is the opposite of what we are trying to accomplish. I would avoid the sauna all together while doing your IPL treatments. You can resume 2 weeks after your last treatment, for the best results.

I would not recommend using a wet or dry Sauna so close to an IPL.  Your skin remains in a healing phase and is vulnerable to thermal injury.  Think of IPL as a "controlled burn"--you wouldn't want to add intense heat after a burn.  Also, you want to avoid/minimize flushing if the IPL treatment was used to treat red vessels.  Let everything settle down....I would recommend one month.