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25 Signs of Marijuana Use Parents Can’t Afford to Overlook

Last updated: 09/20/2018
Author: Medical Review

Reading Time: 3 minutes

1. Red Eyes

According to the NIH, “someone taking marijuana can have red, bloodshot eyes.” This is a common symptom of marijuana use.

2. Appetite Increase

Marijuana use can cause your child’s appetite for “junk food” to increase.

3. Smoke Smell

An important sign of marijuana abuse is the smell of the smoke on your child’s clothes and hair. It “smells sweeter than cigarette smoke.”

4. Dry Mouth

Marijuana users may drink water constantly or do other things to combat the side effect of dry mouth.

5. Impaired Perception

Your child’s perception will be impaired if he or she is under the influence of marijuana.

6. Sleepiness

Signs of Marijuana Use

If your kid starts skipping school, they could be using marijuana.

Fatigue and drowsiness are strong signs of marijuana intoxication.

7. Impaired Motor Skills

It will be difficult for someone high on marijuana to perform simple tasks and to do things that require hand-eye coordination like driving.

8. Short-term Memory Problems

Your child may forget something you just said to him or her because of the effects of smoking marijuana.

9. Coughing

Chronic marijuana smoking can cause chronic cough and “breathing problems” like smoking cigarettes can, according to the NLM.

10. Learning Problems

Increased learning problems are often signs of long-term marijuana use.

11. Paraphernalia

Some marijuana-related paraphernalia to be aware of as signs of use are:

  • “Hand-pipes made of glass or wood” (CESAR)
  • Waterpipes (bongs)
  • Vaporizers
  • Cigar wrappers
  • Cigarette paper
  • Visine/eye drops
  • Lighters
  • Empty baggies
  • Grinders
  • Jars/containers with marijuana remnants
  • Small weight scales

12. Dizziness

Dizziness is a sign of marijuana intoxication.

13. Giddiness

Giddiness and euphoria go together as signs of marijuana use. CESAR describes this behavior as “acting silly or giggly for no reason.”

14. Anxiety

Marijuana can sometimes cause severe anxiety in a person who does not usually have problems with this emotion.

15. Apathy

Apathy toward activities your child used to enjoy or old friends can be a sign of marijuana use.

16. Paranoia

Another unpleasant symptom of marijuana use is paranoia.

17. The Use of Slang Terms for Marijuana and Marijuana Abuse


  • Weed
  • Pot
  • Grass
  • Ganja
  • Mary Jane
  • Wheezy
  • 420
  • Joint
  • Blunt

18. Missing School or Work

If your child is missing lots of school or work, this can be a negative sign and may mean that their use of the drug is becoming more regular or intense.

19. Disinterest in Appearance

A strong symptom of drug use, according to the NLM, is “not caring abut physical appearance” to the point of neglecting hygiene and other aspects of such.

20. Psychosis

According to the NLM, “More serious side effects include panic, paranoia, or acute psychosis.” These symptoms are definite cause for alarm.

21. Secretive Behavior

Your child will not say where he or she has been and attempts to hide the use of marijuana from you.

22. Hostility

If your child becomes hostile when asked about drug dependence or use, this is a strong sign.

23. Confusion

Generalized confusion, whether your child is currently intoxicated or not, is a sign of regular abuse of marijuana.

24. Increased Heart Beat

Smoking marijuana can increase a person’s heartbeat for some time afterwards.

25. Drug-seeking Behavior

If your child seeks out marijuana, spends all their money on the drug, and does whatever they can to obtain it, even dangerous actions, this is a sign of addiction.