early detection of smoking marijuana.

Hi, I have a question about ;what are the symptoms of a kid smoking marijuana at a teenage age?Im abit concern about this kid,he geos to his friends house and when he comes back to his home his attitude is different.For eg;attitude,angry,eyes abit darker around them,hates this,hates that etc.Please could you help.thank you

[hopeful mom]

I'm 50 yrs old. It's been a long time since I've smoked marijuana. As I recall the pupils dialate. Most marijuana smokers tend to be more mellow not angry. I had the experience of raising two teens. I don't think my nerves have fully recovered from it. My son was more into drinking for his drug of choice. He showed anger. My daughter did anything she could get her hands on. I wish I knew then what I know now. I sought every kind of counseling you could think of. At that time my children were going through emotional hell as I was getting a divorce from their father. They were angry angry angry. Usually we let the anger and hurt out on the person we feel most close to. That was me. Most of the counselors were into the tough love thing. I don't know if that's still popular, but in my opinion that is going to achieve the opposite reaction. After all who wants to respect the opinion of a person being so mean (in their eyes).If I were you I would try hard not to get angry with your child. Instead try to be his biggest fan. Try not to boss him. I know as a parent it is hard not to have the attitude that since your the parent your in charge. Teens get to the stage where they do not want someone in charge of them, in response they rebel. I would set up respect for the house rules and every person living there. No one should be yelling or disrespectful to one another. There are rules to follow for everyone that lives together. Keeping the other person informed as to your where abouts applies to everyone not just a teen. If I stay out late shopping I call home to let my loved ones know so that they don't worry. So you see even at 50 we all have rules to follow, so that we don't hurt or worry people that love us. That was just an example, my point is that if you love a teenager with rules it's different than demanding them to behave. Old patterns are hard to break. If you think he is using any kind of drugs I would go to a counselor. I would go through the back door with this. I would tell him that it is because you and him are having a hard time communicating in a positive way. That you both need counseling to learn how to do this in a better way. Apologize to him for any wrong doing on your part and ask him to try to work this out with you. If he is using drugs the counselor should be able to detect it. Do not ask his permission to make an appointment at counseling,if he refuses to go,you go. I know it would be easier if teens just took our good advice. But they usually don't.