I have got nevus of ota. Took several laser sessions. I am prone for post inflammatory hyperpigmentation after acne or laser. Most of the nevus was gone. Again a patch developed 6 months after my last session i.e., 20 jan 2020( had taken combined oc pills for pcod for a month before it). I want to know if it is dermal or epidermal pigment , so that i can decide whether i need another laser session or topical creams. Is woods lamp the best way to differentiate between dermal and epidermal pigment? Any clinic in bangalore that can provide the service ?