Pimples form because of harmful bacterial substances getting into your pores. Often times when people pick at them, they are further pushing the substances into their skin.
Pure Henna (that which has been made entirely from natural products and oils) is safe. Assuming that you have no allergies to the substance, it is safe to apply to your skin.
Whether you’re looking forward to Christmas on the beach or you have to fly to see the in-laws around a Christmas ham, we know that heading to the airport can leave your skin a little less than perfect.