Our expert says:
You'll easily find lots of reading material about bipolar disorder (BPD) bopth here on Health24 in the Mind section, and by doing a web search, eg Google.com. Depression, and Bipolar Disorder are hereditary to an extent. They're not like some problems where if your dad or mom had it, you are doomed to have it --- no, but if one parent had it your chances of eventually developing it are higher than in someone with non of it in the family. IF both mom and dad had it, your chances would be still higher. What one may be inheriting is a vulnerability within one's chemistry, which makes it easier to develop that disorder rather than some other, when a combination of other circumstances, not all understood, happen to lean in the same direction.
As for the signs of it, that'll be covered in detail in the materials you'll find on searching, and you'll have noticed them in your dad. Depression may start by showing itself either with a persistent depression of mood out of proportion to what's going on in your life, or with the other signs of depression, as outlined in our descriptions elsewhere in the site.
Remember, it's a question of a somewhat increased risk, not a certainty. Avoid things like excess alcohol intake ( alcohol is a powerful brain depressant ).
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