Methamphetamine, chemically known as methamphetamine, or methamphetamine. It is also known as “ice” because of its crystal clear appearance and white or transparent crystal shape. Methamphetamine was first introduced as a drug in the 1930s, and was used by some patients as a drug to relieve fatigue and treat asthma. By the 1960s, the drug was widely abused and classified as a drug. From the United States and Europe in the last century, to Japan and Southeast Asian countries have experienced or are experiencing a wave of methamphetamine abuse. From the beginning of this century, methamphetamine entered China, initially in coastal areas and then gradually inland. Today, the drug has been found to be abused in most areas of the country, and methamphetamine and marijuana have replaced heroin as the most abused drugs. Methamphetamine is easily abused because of its special mechanism of action. As an amphetamine-like substance, methamphetamine has a stronger euphoric effect. After methamphetamine use, abusers experience intense euphoria, can exercise vigorously without fatigue, stay up for nights, talk more, be irritable, act impulsively, have an increased sex drive, and do not think about eating. Physiologically, the symptoms are increased blood pressure, increased heart rate, vomiting, abdominal pain and diarrhea, teeth grinding, etc. Mentally, there are a lot of hallucinations, sensitivity, suspiciousness, nervousness and fear, relationship, victimization and jealousy delusions, and the experience of being followed and monitored. Once you stop using meth for a few days, you will experience depression, depression, anxiety and restlessness, and some patients will have the impulse to injure and destroy things or commit suicide and self-injury. In pursuit of the euphoria brought by methamphetamine and to avoid the unpleasantness of stopping, most abusers become addicted after taking meth several times and gradually become dependent on the drug, gradually developing from a few days of smoking to daily use. This eventually leads to intoxication, insanity or death. As a drug, methamphetamine brings harm to the whole family, often the whole family suffers, countless families are torn apart, money and affection are reduced to nothing in the fire and smoke.