There is no one treatment fits all. But often, the best way to deal with pimples is to remove existing blemishes with a combination of cleansing your skin, peeling or exfoliating away dead skin that holds pores tight and traps sebum inside, reducing the inflammation that makes pimples red and enlarged, and smoothing away fine lines and small acne scars.
The truth is there are no medical treatments available with zero potential hazards. IPL hair removal and laser hair removal are no exception. The side effects involved can be temporary (15min) or long term (months, years or even permanent). I also categorise side effects into common and rare.