Dental problems, such as gingivitis or tooth decay, do not cause acne. However, these conditions can lead to other skin issues like cellulite and wrinkles in the eyes area. This is due to poor blood flow circulation after bacteria from the mouth enter tissues near your jawline, causing inflammation and an increased chance of developing PIE (post-inflammatory erythema) Plus, this type of acne may appear as deep, inflamed pimples or blemishes rather than the usual blackheads and whiteheads.