Acne is an inflammatory skin condition that presents differently depending on the causes. Generally, there are four types of acne:
Cystic acne: this type of acne causes deep, painful, pus-filled nodules to form deep in the skin as oil and dead skin cells clog skin pores, which are then invaded with bacteria. Cystic acne is the most severe form of acne and often causes scarring.
Hormonal acne: our hormones control our sebum production, so at different times of our life or cycle, sebum is produced in excess, causing acne.
Fungal acne: this is caused by the build-up of yeast, or candida, in the hair follicles. This can quickly become inflamed.
Nodular acne: this is a severe type of acne where firm nodules form deep under the skin with a pimple on the surface.