using pore-clogging products
makeup
dehydration
diet high in sugar & dairy
overcleansing or overusing products
using products with irritating ingredients
too much sun exposure
hormonal imbalance
lack of sleep
stress
nutrient deficiency (fatty acids, zinc, vitamins)
touching your face
sweat buildup
dirty pillowcases, makeup brushes, and phones
letting hair touch your face
digestive problems
certain medications (corticosteroids, lithium, testosterone, some birth control pills)
friction or pressure on skin
climate, air pollution, smoking
genetics
