Crystal meth is a type of amphetamine. It is a crystal form of a drug formally known as methamphetamine, and can be snorted, injected or swallowed. There is also another type which can be smoked, known usually as ice. Crystal meth "highs" last a long time and give a stimulating effect of boosted self-confidence which, together with the relatively low cost, feelings of euphoria and sense of sharpened focus make crystal meth addiction easy to develop. Use of crystal meth leads to a variety of unpleasant mental and emotional side effects including anxiety, paranoia, hallucinations and other psychotic illnesses. There are many highly dangerous physical problems which develop due to crystal meth addiction, such as lung damage, kidney damage, strokes and even death.