Fungal acne, medically known as Malassezia folliculitis, is caused by an overgrowth of a yeast called Malassezia (formerly Pityrosporum) that naturally lives on everyone's skin. This yeast infects hair follicles, leading to inflammation and the development of acne-like spots

. Several factors can cause or contribute to this overgrowth and infection:

• Warm, moist environments: Heat, humidity, sweating, and trapped moisture (such as from sweaty workout clothes or tight, non-breathable clothing) create ideal conditions for Malassezia to thrive

• Damage to hair follicles: Actions like shaving, waxing, plucking, or frequent rubbing can damage follicles, allowing yeast to enter and multiply

• Use of antibiotics: Antibiotics reduce skin bacteria that normally keep yeast in check, leading to yeast overgrowth

• Suppressed immune system: Conditions or medications that weaken immunity make it harder for the body to control yeast growth

• Oily skin and excess sebum: While fungal acne is not caused by bacteria like typical acne, oily skin can provide nutrients that support yeast growth

• Other factors: Prolonged use of steroids, certain skincare products that occlude the skin, and dietary factors (carbohydrate intake) may also contribute

In summary, fungal acne results from an imbalance in the skin's natural flora, where Malassezia yeast overgrows due to warm, moist conditions, follicle damage, immune suppression, or disruption of normal skin bacteria, leading to follicular infection and acne-like inflammation