A sign is something other people, like a doctor, notice while a symptom is something that the patient describes. For instance, drowsiness might be a symptom while dilated pupils might be a sign.
Substance dependence is when someone is addicted to a something like drugs or alcohol and they are not able to control their use of the 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)
Substance reliance can bring about effective yearnings. The person addicted may be willing to stop taking it, but they are not able on their own.
The signs and symptoms of substance reliance change as indicated by the individual, the substance they are dependent on, their family history (hereditary qualities) and individual conditions.
Some of the symptoms and signs of drug dependence can include:
Some people who abuse drugs or alcohol might not be technically addicted but can still suffer the effects mentioned here but do not usually suffer from withdrawal symptoms or have the same obsession to use the substance.