While the signs are noticed by the doctor and people around the addict, the symptoms are known to the addict alone. For instance, drowsiness might be a symptom while dilated pupils might be a sign.
Drug addiction - when an individual is dependent on a substance, like a drug, nicotine or alcohol, he/she is unable to manage his/her use of that substance. Though these may be dangerous to them, they go ahead with alcohol consumption (the possible dangers may or may not be clear to the person)
Drug addiction can lead to strong cravings. Addicts may desire to quit (give up), however experiences it very hard to do without assistance.
The condition of the person, their family lineage, the substance in question, and the person involved are some of the factors that determine the possible signs and symptoms of addiction.
The clues and indicators of addiction could be that:
Those who are addicted to alcohol and drugs on a technical manner may be exposed to the aforementioned dangers, but the severe urge to consume drugs and the withdrawal symptoms witnessed by an addict may not be present.