Why is it that IPL treatments have to be 3-6 weeks apart?

The minimum amount of time between IPL treatments is usually 3 weeks.  This allows "damaged pigmented" lesions to absorb completely.  Initially the sunspots turn darker because of the heat generated from the laser.  The body sees this damaged, darkened pigment as debris and needs to be removed.  This removal process can fully take up to 3 weeks.   
 
None of the above is not intended as medical advice. If you have a medical concern, please consult your doctor.