Styling gels, oils, and conditioners can clog hairline and forehead pores, causing "pomade acne."
Sugary snacks, white bread, and processed foods can raise insulin levels, which can increase oil production and inflammation, causing acne.
Corticosteroids, birth control pills, and lithium-containing medicines might cause acne owing to hormone or skin irritation.
Skin health can be affected by dehydration. Dehydrated skin produces extra oil to compensate, which can clog pores and cause acne.
Non-breathable tight clothing can trap perspiration and bacteria against the skin, causing acne.
Unwashed hands can transfer dirt, oil, and bacteria to the skin, producing outbreaks or worsening acne.
Pollution and environmental aggressors can cause skin irritation and clogged pores, causing acne, especially in severely polluted locations.
Insufficient sleep can affect hormone levels and elevate stress, which can cause inflammation and acne.
Over-exfoliation can strip the skin of its natural oils and disturb the skin barrier, causing oil production and acne flare-ups.
Hormonal changes caused by stress increase oil production and inflammation, which contribute to acne.