"unstable mood" is a correct and usable part of a sentence in written English.
It is typically used to describe someone's emotional state or temperament as unpredictable or prone to frequent changes. Example: "She struggled with an unstable mood, often fluctuating between moments of extreme happiness and deep sadness."
Borderline personality disorder is characterized by an extraordinarily unstable mood and self-image.
Ms. Tucker is sometimes an unsteady singer, as on "No Bad News Tonight," though in that case it matches the song's unstable mood.
Patients were divided into two sets of stable and unstable mood based on a psychiatric evaluation of an initial 6-month period of mood score data.
The condition was noted as one of five categories: (0) Euthymia; (1) Depressive episode; (2) Hypomania or mania; (3) Mixed episode; (4) Unstable mood.
Long-lasting clinically significant mood instability that did not fulfill the criteria for any mood episode was assessed as an "unstable" mood, while subthreshold symptoms were assessed as no change in episode (Perlis et al. 2006).
Bonsall et al. (2012) focused on QIDS scores fitting different nonlinear time series to two clinically identified groups of patients (those with relatively stable or unstable mood scores) using a small sample size.
Another patient, a young woman with unstable moods, was recently hospitalized with a diagnosis of bipolar disorder.
In "A Really Good Day: How Microdosing Made a Mega Difference in My Mood, My Marriage, and My Life," Waldman describes a monthlong experiment treating her unstable moods with minuscule doses of LSD.
Mea Pearson first confronted the world of online therapy after returning home from being diagnosed with borderline personality disorder, a mental illness characterized by unstable moods, behavior and relationships, in 2012 – a conclusion doctors reached after she attempted suicide.
Since the GPS is "inherently erratic," according to Thiel, "the plants to seem to wander around and visitors have to actively look for them— perfect for creating an unstable, erratic mood for my dystopian sci-fi climate change scenario".
I quickly stopped taking my medication and, for three months, I experienced an unstable, elevated mood.
