If I went tanning this morning, and my chemical peel is scheduled in five days, should I hold off?

It would be a good idea to see your doctor to be sure that he or she wanted this to happen.  It may be perfectly normal as the skin in treated areas is damaged and turns brown.  If you had more pigment in this area, the peel will make it even browner than surrounding tissue.  Just...

Your red spot should fade in time.  Return to your provider for assistance with management.  You don't mention what was being treated with the targeted chemical peel but it may require ongoing treatment and follow-up.  The acid causes a controlled damage to the skin and new cells...

After several years, the pigment will not return  There are some reports of Latisse improving lost pigment when topically applied to fractional laser pixels immediatly after treatment, but I have never seen reports concerning pigment in mucous membranes.  A makeup tattoo artist that...