Sometimes I'm happy and in a second I feel deeply sad without an apparent reason, why?

Perhaps you suffer from manic depression like myself, or you may just have the human anxieties and problems that have hurt us since the beginning of time. Like Solomon's ring says "This too shall pass."

I believe being happy one minute and then deeply sad the next is part and parcel of a bipolar disorder characterized by mood swings. These abrupt changes in emotion are difficult to deal with and sometimes hard for others to understand. Depending on whether you have Bipolar I or Bipolar II, the types of swings will vary. Bipolar I patients can become extremely manic, or one might say “happy”. The next minute there inflated happy mood will crash and they can have a difficult time getting out of bed. Bipolar II people are less manic and more on the depressive side. They have more difficulty getting out of a depressed frame of mind, thinking clearly and positively. All bipolars experience mood swings for no apparent reason.

There are actually three types of bipolar disorder. The third is bipolar nos. This type cause extreme rapid cycling. Maybe this is what you are experiencing?

Bipolar is a mental sickness that affects your moods. Generally you have two moods you are either depressed or happy. For me personal I prefer to stay in one mood I have learned that my happy always leads to a sad and a sad mood is easier to manage than a happy. Once you are happy you are bound to be sad. Try to keep your life as normal as possible.

This is called rapid cycling. Everyone with bipolar has different cycling periods. And it can constantly change. Sometimes i cycle so rapidly that i can't keep a stable emotion for even a minutes (true story my parents would totally agree). Other times you can cycling more slowly (for example months at a time). Medication can help ease the intensity of these manic and depressed feelings/episodes. I've personally found that i feel extremely on edge and insane on my rapid cycling days. I feel like i cant control myself and it feels like everything is out of reach for me. Like i don't get a say. My medication makes these feelings not so intense and crazy and out of control but i still experience cycling.

It happens to me too actually, Noone knows their self too well and sometimes we need some time for ourself and it might be our body telling us its time to breathe, or it could be an incident which has affected you but you dont seem to think much of it, there are many reasons why but what I usually do then is close my phone and try out new things, it could be a new dish or a new novel, anything which might be something you have never done, make a wish list, keep a diary, experience something new, I hope everything gets sorted out and if it gets worse than try going to a therapist cause it might be serious

It might be an idea to become aware of your thoughts than when you feel a sudden mood switch. Often we are not really monitoring what we're thinking and the mood switch goes unconciously. But when you do pay conscious attention I think you will be more aware. And when you get more aware you are able to do something about it. For example with cognitive behavioural therapy. You can choose 'The Work' for that from Byron Katie to help you cope with your thoughts better:) It's a good idea to check her out lots of free material online.