animation to be bad and mad re Frothys comment or to be a peodophile and mentally Ill is not a duel diagnosis as being bad or a peodophile are not illnesses.
The term duel diagnosis is most often used to describe a person suffering mental illness and substance abuse, it's also used to describe someone with sen who also suffers mental health problems
Someone with pd can also go through fazes of being well and unwell the same as someone with bipolar disorder or schizophrenia. The condition doesn't stay the same all tge time, we can have patients that are well for years and need no intervention then something can trigger a relapse and they become very unwell.
With help and talking therapy many people are able to manage their pd. It's all about learning about their pd and how it affects them as individuals, what can trigger ill health, looking for signs that they are becoming unwell etc and understanding how their personality differed from other people's and why.
It's easier to do this as you get older and mature, that is why people believe it gets better as you age, it's very difficult for a teenager to manage the condition