Cyclothymia, or cyclothymic disorder, causes mood changes – from feeling low to emotional highs.
Cyclothymia has many similarities to bipolar disorder.
Most people's symptoms are mild enough that they don't seek mental health treatment, or the emotional highs feel nice, so they don't realise there's anything wrong or want to seek help.
This means cyclothymia often goes undiagnosed and untreated.
But the mood swings can affect daily life, and cause problems with personal and work relationships.
If you think you have cyclothymia, it's important to seek help from your GP.
People with cyclothymia are at risk of developing bipolar disorder, so it's important to get help before reaching this later stage.
Men and women of any age can get cyclothymia, but it's more common in women.