I was diagnosed with "major depression" when I was 14, did the medication and therapy thing for a bit but the medication made me a zombie. Therapy helped me learn to cope a little better, but I was never "cured" of my depression. My 20s have been pretty bad, but in the last year and a half I've lost 100+lbs and have been running and lifting. It turns out the common sense advice to depression was really what I needed…
- Regular good sleep. Go to bed and wake up at the same time every day.
- Good exercise every day. This will help with the sleep too.
- Eat healthy food on a consistent schedule
- Avoid alcohol
- If you don't get much sun, check your Vit D levels and take supplements if needed
These things will almost always make big difference. If you're still strugging you need to see a psychologist or try some medication. Medication is hit and miss so you'll probably need to experiment with different types to find something that works for you. And of course some people just don't respond to depression medication at all. Cognitive behavioural therapy is often helpful and there are other therapy options too.
Depression is multi-faceted and you will usually need a variety of treatments to get the best results.
Some people recover and go back to normal, but many sufferers will have manage it for their whole lives.