Answer:
Bipolar disorder.
Step-by-step explanation:
Bipolar disorder may be defined as a type of mental disorder in which a person feels highly energetic, irritable or happy. The genetic as well as environmental factor plays an important role in bipolar disorder.
The individual suffering from bipolar disorder experience mood swings, deep depression. Lizbet seems on emotional roller coaster and might be suffering from bipolar disorder.
Thus, the answer is bipolar disorder.