Acne occurs when hair follicles clog up. Several factors can contribute to jawline acne, including genetics, certain conditions, and medications. Over-the-counter treatments may help, but severe cases might require prescription medication. Improvement can take weeks, depending on the treatment and severity. Causes of Jawline Acne – The skin produces natural oils through sebaceous glands, which reach the surface via hair follicles. When excess dirt, hair, or dead skin cells clog these pores, bacteria can grow, leading to inflammation and acne