Laser inconsistency (Photo)

I had 2 Laser doctors with both same results. 6 years laser with slight improvement. Last year I told my doctor to lower settings to avoid pain as hair will still grow back so might as well lessen the pain. It very minimal compared to other times and I saw a huge improvement with fine hairs nearly gone. The last time I did it was painful and all hair grew back. Like promoting growth. She said she used the same settings. Settings: 24/8 or 24/9. Dark hair, Mediterranean skin.

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