Cani, I agree. I think mental health needs to be taught in schools
. Sexual education is taught, mental health needs to be taught.
I don't know if under diagnosed is a good term though. Mental illness/health issues is becoming this relative thing, which is not good. It seems like if someone has a problem with someone else, they automatically label them as mentally ill. Wrong. Anger, sadness, happiness/joy, etc. are normal emotions. Mental illness occurs when extreme emotion occurs that affects one's life/others around them over a set period of time. Then, you have to consider expected grief--death of a loved one, divorce, etc. It's okay to go through grief and it's okay, to be numb/feel nothing at all when something like death happens. After a period of time of grief (1-2 yrs depending on the source you look at) and not getting over something, then that's complicated grieving. That can set you up for long term problems, especially if genetically you are predisposed to mental health issues.
"Genetics loads the gun, environment pulls the trigger."--Judith Stern
The whole idea behind mental health issues/illness is that those people have abnormal thought processes/actions. If you have criteria that there's the slightest emotion in someone and they are considered mentally ill, that becomes normal, not abnormal, because most people in the world would be considered mentally ill.
In the overhaul on mental health issues, there needs to be better criteria in diagnosing mental illness and zero self diagnosing. I love the internet, but I think people are trying to figure out what is wrong with themselves or others, and they diagnose something that may not actually be true.