sentences:  During puberty, an increase in sex hormones called androgens causes the skin follicle glands to grow larger and make more oily sebum.The androgen hormones testosterone, dihydrotestosterone (DHT), and dehydroepiandrosterone (DHEA) are all linked to acne.High levels of growth hormone (GH) and insulin-like growth factor 1 (IGF-1) are also associated with worsened acne.