Change in personality - This one can be a little tricky because teenagers are full of hormones that affect their moods. One minute they can be happy and the next minute sad, angry, or crying. This behavior is normal to a degree. Parents know their children. If you suspect that your child’s character or behavior has gone to extremes (maybe they are more talkative and energetic than normal or sleeping more than usual), this can be a sign of a drug/alcohol problem.
Withdrawing from interests - The teen years are when we figure out our likes and dislikes and take a stand with what we want to do with our time. Refusing to go to church or refusing to visit the grandparents may be normal. But if you notice that your child stops doing the activities that they once loved (such as sports, clubs, art, etc.), this can be a warning sign. When addiction begins to take over, it takes precedence over other activities that one once found enjoyable.
Doing poorly in school – One of the first signs of a teenager experiencing some kind of problem is a change in their school performance. Skipping class, not wanting to go to school, getting in trouble, and dropping grades are all signs of a problem. Do not take these lightly.
Weight change - Loss of appetite and a significant amount of weight loss can mean more than dieting.
Money problems - Unexplained need for money or money missing from the house can be signs of addiction. Be aware of manipulating behavior when your child asks for money or if you find money missing.
Feeling sick - If your teen is getting sick and refuses to go to the doctor, there may be a problem. Look for signs such as blood shot eyes, dilated pupils, frequent nosebleeds, headaches, marks on arms, profuse sweating, nausea or vomiting, and shakes or tremors.
Sudden desire for privacy – If your teen has always left their bedroom door open and now locks it, follow your gut. If they are acting suspicious, they probably are doing something that they do not want you to know about.