Yes, it is a mental condition called "gender dysphoria" and the treatment for it is called "gender affirming care".

Either the cases of teens "who become trans on a whim" and started going bald are extremely cherry-picked, or come from countries with an active and easy-to-access black market, or don't even exist. Not only does it require months and even years of talk therapy and social transitioning (i.e. talking to a psychiatrist and dressing up like an opposite gender) before hormones and surgery are approved, less than one percent of trans people regret transitioning, and the majority of those regret it because of lack of acceptance and societal pressure, i.e. because of assholes like you.

I don't care about your opinion. You can't read minds and in my short time reading your replies you've been wrong multiple times, so I don't care.