Meth impacts the central nervous system and can produce an instant and intense “rush” or “flash” of pleasurable effects like heightened sexual arousal and self-confidence. Meth also causes increased physical activity, increased respiration and decreased appetite. Negative psychological side effects may include depression, irritability, aggression, confusion and anxiety. Meth can also impair one’s judgment, mess with one’s impulse control and make it harder for one to think logically. Physical complications may include dental and skin problems, insomnia, erectile dysfunction, decreased energy and motivation, abnormal heartbeat, dangerously high body temperature, tremors, convulsions, or stroke. Long-term meth use can result in psychotic symptoms such as paranoia, auditory and/or visual hallucinations, delusions, and repetitive movements and behavior patterns.