Heroin is a psychobehavioral abnormality among opioid drugs with typical physical manifestations of withdrawal syndrome and drug-seeking behavior. Characteristic somatic manifestations show such things as injection needle marks, tearfulness and runny eyes, yellowing, weakness, pallor, depression, dull eyes, thinness, and nose-wiping habits. Understanding these characteristics can help in the early detection of drug abusers. The common external characteristics of drug addicts are roughly the following: 1. Diet: loss of appetite and decline. Once the drug addict, especially after addiction, appetite will be greatly reduced, or even do not want to eat at all, only want to drink some water or a small amount of fruit will be able to spend the day, so a period of time, weight loss significantly, people also gradually thin, face lost luster, eyes dull, especially the original like to drink people, suddenly become do not want to drink. 2, the regular aspect of life: long-term hiding in their rooms or away from their families. The only goal of a drug addict’s life after becoming addicted is drugs, and his or her life pattern is to use drugs – sleep – buy drugs – use drugs again, seemingly uninterested in everything else, life hangs on. They are not interested in everything else and live a life of inactivity, even mining, absenteeism, not wanting to do anything, not even one’s daily cleanliness, dressing and hygiene. Drug addicts such as the development of intravenous injection, the arms, legs, often needle eyes, unwilling to reveal their arms and thighs, even in the heat of summer is also wearing long-sleeved clothing and pants, tightly covered limbs. They often stay in the bathroom for a long time, and have to go to the bathroom every few hours. Although constipation is a common accompanying symptom for drug users, their main purpose for going to the bathroom is not to defecate, but to avoid their family members’ drug use. 3. Living room: Drugs or drug paraphernalia (syringes, tinfoil, etc.) are hidden in the room or in the toilet trash. The living room or toilet is left with blood dripping from the injection. 4. Behavior: Behaves furtively, does not want to move around with people, is indifferent to people and things around him/her, becomes withdrawn, lazy and unmotivated. Often hang out with the wrong people, often lying, always trying to cover up their shortcomings or mistakes. Dishonest with people and things, giving the impression of being untrustworthy and losing the sense of family responsibility. Slow reactions, memory loss, lack of personality and dignity. 5. Spending: Spending money like water, often asking for money or borrowing money from parents or relatives or friends with flowery words or stubbornness, but never returning the money borrowed; some simply steal valuables and money from home or work. 6, sexual function: early drug use, drug addicts will appear to the opposite sex special interest, prolonged sexual intercourse, it seems that sexual function has been enhanced, but this is an illusion. With the prolongation of drug use, sexual function is bound to be seriously impaired, the frequency of sexual impulses, frequent intercourse, duration of sexual intercourse and sexual pleasure are reduced or disappeared, male impotence, premature ejaculation, etc. are common. 7, emotional aspects: emotional instability, impulsiveness, irritability, irritability, also some addicts pessimism, depression, suicide, anxiety, irritability, emptiness, boredom and other bad moods. When parents suspect that a family member has signs of drug addiction, a better approach is to talk with him throughout the day. Drug addicted people are always fidgeting, distracted, as if there is something on their mind, and at a certain time, he will yawn, look disoriented, and try to find a reason to leave, which is actually an attack of drug addiction. 8, somatic diseases: long-term use of heroin can lead to malnutrition, low resistance, easy to accompany a variety of somatic infections and infectious diseases. The most common comorbidity is local infection of the skin at the injection site, which can seriously lead to systemic septic infection. Pneumonia, tuberculosis, myocarditis and various types of hepatitis, venereal diseases and AIDS. The eight manifestations listed above suggest that the person may be addicted to drugs and should be examined in a hospital as soon as possible.