Depression Treatment Care

If you think a friend has depression, possibly manic depression how could they get tested?

If you really think about it, shouldn’t the disorders be classified as “Emotional Illness”? So many people in the world that suffer from these illnesses and yet “Mentally” they can be a highly intelligent.
In actuality, the disorders effect the way a person “feels” not necessarily they way they “think”. Where is the line drawn between Thinking (Example: 2+2=4), Feeling and Perceiving (Example: feeling unliked). Would a Low Self Esteem be considered a Mental illness?
We all get depressed and anxious at times, does that make everyone mentally ill? What about Manic Depression, how does that differ from depression and anxiety?

Are they highly genetic? Almost everyone of my relatives has either had dpression, anxiety, manic depression, and schizophrenia. My grandma is severely shcizophrenic. I have anxiety and depression now which im not treating at the moment. If i dont try and get help then could it get worse or could i be at risk for schizophrenia.

I’ve noticed it’s something ppl. misundertand often. Is it treated w/ anti seizure medication/lithium in egypt as well?what kind of drugs? do u know of someone w/ an actual diagnosis + are they shunned by society, accepted or hiding it?