Another factor to consider in the degradation of a meth addict's appearance is the fact that many users also heavily abuse alcohol and tobacco. This further increases the level of toxins and the premature aging side-effects, escalating the aging process even more rapidly.kin. Even light methamphetamine use can cause widespread acne due to the drug's effects of dry skin and extreme itchiness. Coupled with the common sensory hallucination factor of 'bugs crawling beneath the skin,' this often promotes obsessive scratching, picking, and resulting in many small sores and facial scarring.