20 Unmistakable Signs Your Teen Might Be Experimenting with Drugs

13. Increased Secrecy and Evasiveness

A noticeable and consistent increase in secretive behavior, evasiveness when questioned, or locking their bedroom door when they previously didn't, is a significant red flag. Your teen might become highly protective of their phone, computer, or personal belongings, constantly changing passwords or taking their device everywhere. They might avoid eye contact when you ask about their day, become defensive, or disappear for long periods without explanation. This heightened need for privacy often stems from a desire to hide drug use, paraphernalia, or the physical effects of being under the influence.

14. Unexplained Disappearance of Household Items or Valuables

A very concerning sign is the unexplained disappearance of money, jewelry, electronics, or other valuables from the home. While a single missing item might be dismissed, a pattern of items going missing, especially if they are small, easily pawned, or converted to cash, strongly suggests a need to fund a drug habit. This often goes hand-in-hand with financial irregularities (as mentioned in point 6) and indicates a growing desperation to acquire substances.