Acne occurs when hair follicles become clogged with a combination of excess oil and dead skin cells. Bacteria that normally live on the skin can then infect the clogged follicles, leading to more severe acne.
Some factors that can contribute to acne include:
- Genetics: A large UK study found that 81% of acne was due to genetic factors.
- Hormones: Changing hormone levels during puberty and menstruation can cause acne.
- Medications: Some medications, such as those containing steroids, iodides, or bromides, can cause or worsen acne.
- Skin products: Oil from moisturizers or cosmetics can contribute to acne.
- Pressure: Pressure from backpacks, helmets, tight collars, or sports uniforms can aggravate acne.
- Pollution: Dust, dirt, and debris from pollution can collect on the face and block pores.
- Diet: Some people may be more likely to develop acne if they eat a diet high in refined sugars or dairy products.
- Occupation: Exposure to industrial products like cutting oils can cause acne.
- Squeezing or picking: Squeezing or picking at blemishes can make acne worse.
- Sweating: Heavy sweating can contribute to acne.
